13 Cal.4th 497 (1996)

THE PEOPLE, Petitioner,
v.
THE SUPERIOR COURT OF SAN DIEGO COUNTY, Respondent; JESUS ROMERO, Real Party in Interest.

Docket No. S045097.

Supreme Court of California.

June 20, 1996.

*503 COUNSEL

Edwin L. Miller, Jr., and Paul J. Pfingst, District Attorneys, Thomas F. McArdle, Paul M. Morley, Charles E. Nickel and Craig E. Fisher, Deputy District Attorneys, for Petitioner.

Daniel E. Lungren, Attorney General, George Williamson, Chief Assistant Attorney General, Ronald A. Bass, Assistant Attorney General, Ronald E. Niver, Gerald Engler, David H. Rose and Sanjay T. Kumar, Deputy Attorneys General, Gil Garcetti, District Attorney (Los Angeles), George M. Palmer, Brentford J. Ferreira and Diana L. Summerhayes, Deputy District Attorneys, Gary T. Yancey, District Attorney (Contra Costa), L. Douglas Pipes, Deputy District Attorney, and Kent S. Scheidegger as Amici Curiae on behalf of Petitioner.

No apperance for Respondent.

Francis J. Bardsley, Public Defender, and Gary R. Nichols, Deputy Public Defender, for Real Party in Interest.

Michael P. Judge, Public Defender (Los Angeles), Albert J. Menaster, Tracy Mooney and Alex Ricciardulli, Deputy Public Defenders, Charles H. James, Public Defender (Contra Costa), Ron Boyer, Deputy Public Defender, John T. Philipsborn and R. Clayton Seaman, Jr., as Amici Curiae on behalf of Real Party in Interest.

*504 OPINION

WERDEGAR, J.

Penal Code section 1385, subdivision (a), authorizes a trial court to dismiss a criminal action "in furtherance of justice" on its own motion. (All further statutory citations are to the Penal Code except as noted.) We have held that the power to dismiss an action includes the lesser power to strike factual allegations relevant to sentencing, such as the allegation that a defendant has prior felony convictions. (People v. Thomas (1992) 4 Cal.4th 206, 209-210 [14 Cal. Rptr.2d 174, 841 P.2d 159]; People v. Burke (1956) 47 Cal.2d 45, 50-51 [301 P.2d 241].) This case raises the question whether a court may, on its own motion, strike prior felony conviction allegations in cases arising under the law known as "Three Strikes and You're Out." (§ 667, subds. (b)-(i), added by Stats. 1994, ch. 12, § 1, eff. Mar. 7, 1994; see also § 1170.12, added by initiative, Gen. Elec. (Nov. 8, 1994) [Proposition 184].) Although the Legislature may withdraw the statutory power to dismiss in furtherance of justice, we conclude it has not done so in the Three Strikes law. Accordingly, in cases charged under that law, a court may exercise the power to dismiss granted in section 1385, either on the court's own motion or on that of the prosecuting attorney, subject, however, to strict compliance with the provisions of section 1385 and to review for abuse of discretion.

I. BACKGROUND

A. The Three Strikes Law

The Three Strikes law consists of two, nearly identical statutory schemes designed to increase the prison terms of repeat felons. The earlier provision, which the Legislature enacted, was codified as section 667, subdivisions (b) through (i). The later provision, which the voters adopted through the initiative process, was codified as section 1170.12.^[1]

The legislative version of the Three Strikes law began as Assembly Bill No. 971, which was introduced on March 1, 1993. (Assem. Bill No. 971 (1993-1994 Reg. Sess.).) As originally introduced, the bill would have added a new section 1170.12 to the Penal Code, imposing doubled sentences on second-time felons and life sentences on third-time felons. The bill failed in the Assembly Committee on Public Safety on April 20 of that year. A motion to reconsider was granted, but no further hearings on the bill would take place until 1994.

*505 Meanwhile, on October 7, 1993, a petition to add Proposition 184 to the ballot for the November 1994 General Election began to circulate for signatures. The initiative was loosely based on Assembly Bill No. 971 and likewise proposed to add a new section 1170.12 to the Penal Code. A notable difference between the original bill and the initiative was that the bill counted all prior felonies as "strikes" in determining the defendant's sentence, while the initiative counted prior felonies only if they were defined as "violent" or "serious" in other sections of the Penal Code. (See § 667.5, subd. (c) [defining "violent felony"]; § 1192.7, subd. (c) [defining "serious felony"].) Another notable difference was that the initiative permitted the prosecutor to move to strike prior felony conviction allegations "in the furtherance of justice pursuant to section 1385," while the bill permitted a motion to strike only for insufficient evidence.

On January 3, 1994, while Proposition 184 was circulating, the sponsors of Assembly Bill No. 971 amended it to conform to the language of the initiative, with minor exceptions. The bill underwent its only further significant amendment on January 13, when the proposal was made to codify its provisions as subdivisions (b) through (i) of section 667, rather than as a new section 1170.12. Both the Senate and the Assembly approved the bill on March 3, 1994. The Governor signed it on March 7. It took effect as an urgency measure the same day.

March 7, 1994, was also the last day on which Proposition 184 could lawfully circulate for signatures. On April 6, 1994, the Secretary of State certified the initiative for the ballot, and the voters approved it at the General Election on November 8, 1994. It took effect the next day, codified as section 1170.12.

The case before us involves a crime committed on May 9, 1994. It thus arises under the legislative statute (§ 667, subds. (b)-(i)) rather than under the initiative statute (§ 1170.12). While the two statutes differ in minor respects, no such difference affects the questions before us in this case.^[2] In summary, both statutes have this effect: When a defendant is convicted of a felony, and it is pleaded and proved that he has committed one or more prior felonies defined as "violent" or "serious," sentencing proceeds under the Three Strikes law "[n]otwithstanding any other law" (§ 667, subd. (c); § 1170.12, subd. (a).) Prior felonies qualifying as "serious" or "violent" are taken into account regardless of their age. (§ 667, subd. (c)(3); § 1170.12, subd. (a)(3).) The current felony need not be "violent" or "serious." (§ 667, subd. (c); § 1170.12, subd. (a).) If the defendant has only one qualifying prior felony conviction, the prescribed term of imprisonment (or the minimum term if the current offense calls for an indeterminate sentence) is *506 "twice the term otherwise provided as punishment for the current felony conviction." (§ 667, subd. (e)(1); § 1170.12, subd. (c)(1).) If the defendant has two or more prior qualifying felonies, the prescribed sentence is "an indeterminate term of life imprisonment...." (§ 667, subd. (e)(2)(A); § 1170.12, subd. (c)(2)(A).) Those defendants who are sentenced to life become eligible for parole on a date calculated by reference to a "minimum term." The "minimum term" is the greater of: (a) three times the term otherwise provided for the current conviction; (b) twenty-five years; or (c) the term required by section 1170 (the Determinate Sentencing Act of 1976) for the current conviction, including any enhancements, the term required by section 190 (concerning homicide), or the term required by section 3046 (concerning life sentences). (§ 667, subd. (e)(2)(A)(i)-(iii); § 1170.12, subd. (c)(2)(A) (i)-(iii).) Sentencing on all current offenses is generally consecutive (§ 667, subds. (c)(6)-(8); § 1170.12, subds. (a)(6)-(8)) without any aggregate term limitation (§ 667, subd. (c)(1); § 1170.12, subd. (a)(1)). In sentencing, the court may not grant probation, suspend execution or imposition of sentence (§ 667, subd. (c)(2); § 1170.12, subd. (a)(2)), divert the defendant, or commit the defendant to any facility other than state prison (§ 667, subd. (c)(4); § 1170.12, subd. (a)(4)).

B. Facts

On June 3, 1994, the District Attorney of San Diego County filed an information in the superior court charging defendant Jesus Romero with possession of a controlled substance, namely 0.13 grams of cocaine base, in violation of Health and Safety Code section 11350, subdivision (a). The information also alleged defendant had previously been convicted of the following felonies on the dates indicated: second degree burglary (§ 459) on June 25, 1980; attempted burglary of an inhabited dwelling (§§ 459, 664) on November 16, 1984; first degree burglary of an inhabited dwelling (§ 459) on September 2, 1986; and possession of a controlled substance (Health & Saf. Code, § 11350, subd. (a)) on April 6, 1992, and June 8, 1993.

Defendant's two prior serious felonies (see § 667, subd. (d)(1); § 1192.7, subd. (c) [defining "serious felony"]), namely burglary and attempted burglary of inhabited dwellings, made him eligible for a life sentence under the Three Strikes law. (§ 667, subd. (e)(2).) Without the prior felony conviction allegations, defendant's sentence would fall between one and six years. The current offense, possession of a controlled substance (Health & Saf. Code, § 11350, subd. (a)), is punishable by sixteen months, two years, or three years in state prison (ibid.; Pen. Code, § 18). The three prior felonies for which defendant served prison terms within the last five years, unless stricken pursuant to section 1385, would result in three consecutive one-year *507 enhancements added to the base term for possession of a controlled substance. (§ 667.5, subd. (b).) Defendant's prior felonies do not call for five-year enhancements (§ 667, subd. (a)) because the current offense is not defined as a "serious felony." (§ 1192.7, subd. (c).)

Defendant pled not guilty. At a subsequent hearing, the court indicated its willingness to consider striking the prior felony conviction allegations if defendant changed his plea to guilty as charged on all counts. The prosecutor objected to that procedure, arguing the court had no power to dismiss prior felony allegations in a Three Strikes case unless the prosecutor asked the court to do so. The court disagreed. To interpret the Three Strikes law in this way, the court reasoned, would violate the constitutional doctrine of separation of powers. (Cal. Const., art. III, § 3; see People v. Tenorio (1970) 3 Cal.3d 89 [89 Cal. Rptr. 249, 473 P.2d 993].) After cautioning defendant that the court "was making no promises in the case," the court permitted defendant to change his plea and struck the prior felony conviction allegations. At the sentencing hearing, the court heard further argument by the prosecuting attorney on the propriety of striking the prior felony conviction allegations. The court considered the prosecutor's arguments about the requirements of the Three Strikes law, defendant's criminal history and history of drug abuse, and the court's knowledge of sentences imposed in similar cases. Having done so, the court reaffirmed its decision to strike the prior felony conviction allegations and imposed a sentence of six years in state prison. This sentence represented the upper term for possession of a controlled substance (§ 11350, subd. (a)) plus three consecutive one-year enhancements for defendant's prior felony convictions (§ 667.5, subd. (b)).

The district attorney petitioned for a writ of mandate to require the superior court to vacate its order striking the prior felony conviction allegations and to resentence defendant accordingly. The Court of Appeal concluded the trial court had no power to dismiss prior felony allegations on its own motion in a Three Strikes case; the court therefore directed issuance of a writ requiring the trial court to vacate the sentence and to permit defendant to withdraw his plea. We granted defendant's petition for review.

II. DISCUSSION

The ultimate question before us is whether a trial court may dismiss prior felony conviction allegations in furtherance of justice on its own motion in a case brought under the Three Strikes law. In answering this question, two statutes are of central importance. The first is section 1385 (hereafter section 1385, 1385(a), or 1385(b), as appropriate). It provides as follows: "(a) The judge or magistrate may, either of his or her own motion or upon the *508 application of the prosecuting attorney, and in the furtherance of justice, order an action to be dismissed. The reasons for the dismissal must be set forth in an order entered upon the minutes. No dismissal shall be made for any cause which would be ground of demurrer to the accusatory pleading. [¶] (b) This section does not authorize a judge to strike any prior conviction of a serious felony for purposes of enhancement of a sentence under Section 667."^[3]

(1) As mentioned, we have construed section 1385(a) as permitting a judge to dismiss not only an entire case, but also a part thereof, including the allegation that a defendant has previously been convicted of a felony. (People v. Thomas, supra, 4 Cal.4th at pp. 209-210; People v. Burke, supra, 47 Cal.2d at pp. 50-51.) When a court strikes prior felony conviction allegations in this way, it "`does not wipe out such prior convictions or prevent them from being considered in connection with later convictions.'" (People v. Burke, supra, 47 Cal.2d at p. 51.) Instead, the order striking such allegations simply embodies the court's determination that, "`in the interest of justice' defendant should not be required to undergo a statutorily increased penalty which would follow from judicial determination of [the alleged] fact." (Id. at p. 50.)

The other statute of central importance to this case is section 667, subdivision (f) (hereafter section 667(f), 667(f)(1), or 667(f)(2), as appropriate). A part of the Three Strikes law, the statute provides as follows: "(f)(1) Notwithstanding any other law, subdivisions (b) to (i), inclusive, shall be applied in every case in which a defendant has a prior felony conviction as defined in subdivision (d). The prosecuting attorney shall plead and prove each prior felony conviction except as provided in paragraph (2). [¶] (2) The prosecuting attorney may move to dismiss or strike a prior felony conviction allegation in the furtherance of justice pursuant to Section 1385, or if there is insufficient evidence to prove the prior conviction. If upon the satisfaction of the court that there is insufficient evidence to prove the prior felony conviction, the court may dismiss or strike the allegation." The initiative version of the statute contains an identically worded provision. (§ 1170.12, subd. (d).)

(2a) Defendant argues that the Three Strikes law, if interpreted to permit a court to strike a prior felony conviction allegation only on the prosecutor's motion, violates the doctrine of separation of powers. (3) The doctrine became a part of California law through the adoption of article III, section 3, of the state Constitution. The section provides that "[t]he powers of state government are legislative, executive, and judicial. Persons charged with the *509 exercise of one power may not exercise either of the others except as permitted by this Constitution." (Ibid.) We have said the doctrine's "primary purpose is to prevent the combination in the hands of a single person or group of the basic or fundamental powers of government." (Parker v. Riley (1941) 18 Cal.2d 83, 89 [113 P.2d 873, 134 A.L.R. 1405].) Of the many decisions articulating the separation of powers doctrine, defendant relies primarily on People v. Tenorio, supra, 3 Cal.3d 89, and opinions following Tenorio. (People v. Superior Court (On Tai Ho) (1974) 11 Cal.3d 59, 64-68 [113 Cal. Rptr. 21, 520 P.2d 405]; People v. Navarro (1972) 7 Cal.3d 248, 256-265 [102 Cal. Rptr. 137, 497 P.2d 481]; In re Cortez (1971) 6 Cal.3d 78, 82-90 [98 Cal. Rptr. 307, 490 P.2d 819]; Esteybar v. Municipal Court (1971) 5 Cal.3d 119, 124-128 [95 Cal. Rptr. 524, 485 P.2d 1140]; People v. Clark (1970) 3 Cal.3d 97, 98-99 [89 Cal. Rptr. 253, 473 P.2d 997]; People v. Clay (1971) 18 Cal. App.3d 964, 965-971 [96 Cal. Rptr. 213].)

(4) We examine the impact of the separation of powers doctrine at the outset because constitutional considerations necessarily inform our interpretation of the statutory language. "If a statute is susceptible of two constructions, one of which will render it constitutional and the other unconstitutional in whole or in part, or raise serious and doubtful constitutional questions, the court will adopt the construction which, without doing violence to the reasonable meaning of the language used, will render it valid in its entirety, or free from doubt as to its constitutionality, even though the other construction is equally reasonable. [Citations.] The basis of this rule is the presumption that the Legislature intended, not to violate the Constitution, but to enact a valid statute within the scope of its constitutional powers." (Miller v. Municipal Court (1943) 22 Cal.2d 818, 828 [142 P.2d 297]; see also San Francisco Taxpayers Assn. v. Board of Supervisors (1992) 2 Cal.4th 571, 581 [7 Cal. Rptr.2d 245, 828 P.2d 147]; cf. Crowell v. Benson (1932) 285 U.S. 22, 62 [76 L.Ed. 598, 619, 52 S.Ct. 285] ["When the validity of [an] act of Congress is drawn in question, and even if a serious doubt of constitutionality is raised, it is a cardinal principle that this Court will first ascertain whether a construction of the statute is fairly possible by which the question may be avoided." (Fn. omitted)].)

We begin with the leading case, People v. Tenorio, supra, 3 Cal.3d 89. The defendant in Tenorio was charged with possession of marijuana in violation of Health and Safety Code section 11350. The prosecutor alleged the defendant had previously been convicted of the same offense. While the statute did not mandate a prison sentence for a first offense, for a second offense the statute required the trial court to impose a term of two to ten years. A related statute purported to bar the court from striking the prior-conviction allegation without the prosecutor's consent, in these words: *510 "`[n]o allegation of fact which, if admitted or found to be true, would change the penalty for the offense charged from what the penalty would be if such fact were not alleged and admitted or proved to be true may be dismissed by the court or stricken from the accusatory pleading except upon motion of the district attorney.'" (3 Cal.3d at p. 91, quoting former Health & Saf. Code, § 11718.) Despite this statute, the trial court struck the prior-conviction allegation, reasoning that the Legislature had violated the separation of powers doctrine by giving the prosecutor the power to veto the court's decision to dismiss. The People appealed, and we granted review.

We had addressed the same issue just eight years earlier in People v. Sidener (1962) 58 Cal.2d 645 [25 Cal. Rptr. 697, 375 P.2d 641]. In an opinion for a majority of four, Justice Traynor wrote that Health and Safety Code section 11718 did not violate the separation of powers doctrine; instead, section 11718 merely adopted part of the prosecutor's common law power of nolle prosequi. California's first Legislature had abolished the doctrine of nolle prosequi in a statute that later became Penal Code section 1386.^[4] (Crim. Prac. Act of 1850; Stats. 1850, ch. 119, § 630, p. 323.) Nevertheless, Justice Traynor reasoned, a prosecutor who had enjoyed the power of nolle prosequi would have been able to dismiss charges at any time — before the jury was impaneled, while the case was before the jury, or after verdict. "It would exalt form over substance," Justice Traynor wrote, "to hold that broad constitutional principles of separation of powers and due process of law permit vesting complete discretion in the prosecutor before the case begins, but deny him all discretion once the information is filed." (58 Cal.2d at pp. 650-651.)

Justice Schauer, joined by Justices McComb and White, dissented. (People v. Sidener, supra, 58 Cal.2d 645, 652 (dis. opn. of Schauer, J.); see also id. at p. 674 (dis. opn. of White, J.).) Justice Schauer criticized Justice Traynor's historical premise, arguing that the power of nolle prosequi had never existed in California or the territories that became California. (People v. Sidener, supra, 58 Cal.2d at pp. 658-662 (dis. opn. of Schauer, J.).) Furthermore, Justice Schauer reasoned, the disposition of pending charges was a judicial, rather than a prosecutorial or executive, function; accordingly, the statute in question "violate[d] [the] requirement of separation of powers by subjecting the exercise of an inherently judicial function to the unfettered and unreviewable discretion of the district attorney, a member of the executive branch of government." (Id. at p. 671.)

In People v. Tenorio, supra, 3 Cal.3d 89, the court unanimously overruled People v. Sidener, supra, 58 Cal.2d 645, largely adopting the reasoning of *511 Justice Schauer's dissenting opinion in that case. The author of the opinion in Tenorio, and one other justice, had signed Justice Traynor's opinion in Sidener. Nevertheless, having "reexamined the views expressed therein," the court "conclude[d] that Sidener must be overruled." (People v. Tenorio, supra, 3 Cal.3d at p. 91.)

Because the precise holding in People v. Tenorio, supra, 3 Cal.3d 89, is critically important to the case before us, it is perhaps best to let the court that decided Tenorio speak in its own words. These are the court's reasons for overruling its decision in People v. Sidener, supra, 58 Cal.2d 645, and holding unconstitutional a statute purporting to empower a prosecutor to veto a court's decision to dismiss a prior conviction allegation:

"Because of the uncertainties in the law prior to 1850 [regarding the power of nolle prosequi], we agree with all of the justices in Sidener that arguments based upon California's legal history prior to that date are undeterminative.

"The history from and after the 1850 Legislature, however, is clear: No decision, and no legislation, prior to the adoption of [Health and Safety Code] section 11718 denied that the judiciary has that power to dismiss which was originally codified in the forerunner of section 1385. The prosecutor has never been able to `exercise' the power to dismiss a charged prior — he has only been able to invite the judicial exercise of that power. Section 11718 provides that no prior found true `may be dismissed by the court or stricken from the accusatory pleading except upon motion of the district attorney.' (Italics added.) As Justice Schauer argued, the section itself recognizes that the dismissal power is still exercised by the court, but purports to condition that exercise upon a prosecutor's prior approval. Thus, even if the Legislature could constitutionally remove the power to strike priors from the courts, it has not done so, but rather has purported to vest in the prosecutor the power to foreclose the exercise of an admittedly judicial power by an appropriate judicial officer. It is no answer to suggest that this is but a lesser included portion of the prosecutor's discretion to forego prosecution, as the decision to forego prosecution does not itself deprive persons of liberty.

(5) "When the decision to prosecute has been made, the process which leads to acquittal or to sentencing is fundamentally judicial in nature. Just as the fact of prosecutorial discretion prior to charging a criminal offense does not imply prosecutorial discretion to convict without a judicial determination of guilt, discretion to forego prosecution does not imply discretion to sentence without a judicial determination of those factors which the Legislature has never denied are within the judicial power to determine and which *512 relate to punishment. The judicial power is compromised when a judge, who believes that a charge should be dismissed in the interests of justice, wishes to exercise the power to dismiss but finds that before he may do so he must bargain with the prosecutor. The judicial power must be independent, and a judge should never be required to pay for its exercise." (People v. Tenorio, supra, 3 Cal.3d at p. 94.)

One may fairly summarize the court's reasoning in this way: Whether or not the power of nolle prosequi ever existed, and conceding the Legislature's power to bar a court from dismissing certain charges altogether, when the Legislature does permit a charge to be dismissed the ultimate decision whether to dismiss is a judicial, rather than a prosecutorial or executive, function; to require the prosecutor's consent to the disposition of a criminal charge pending before the court unacceptably compromises judicial independence.

The court in People v. Tenorio, supra, 3 Cal.3d 89, expressly declared that its holding would apply retroactively. (Id. at p. 95, fn. 2.) The court included in its opinion the specific direction that "[a]ny prisoner suffering a sentence imposed after the effective date of Health and Safety Code section 11718 (Sept. 18, 1959) and augmented by virtue of a prior narcotics conviction may file a habeas corpus petition with the superior court inviting the exercise of discretion to dismiss the prior conviction." (Ibid.) Subsequently, the court unanimously granted relief to defendants who had been sentenced before the decision in Tenorio by trial courts who had, for that reason, misunderstood the scope of their discretion. (People v. Clark, supra, 3 Cal.3d 97; In re Cortez, supra, 6 Cal.3d 78.)

In subsequent cases, the court relied on People v. Tenorio, supra, 3 Cal.3d 89, to hold unconstitutional other statutes purporting to give prosecutors the power to veto similar judicial decisions related to the sentencing or other disposition of criminal charges. In People v. Navarro, supra, 7 Cal.3d at pages 258-260, the court unanimously held unconstitutional a statute (former Welf. & Inst. Code, § 3051) requiring a trial court to obtain the prosecutor's consent before sentencing a defendant to a treatment program for narcotics addicts. In Esteybar v. Municipal Court, supra, 5 Cal.3d at pages 124-128, the court unanimously invalidated a statute (former § 17, subd. (b)(5)) forbidding a trial court, without the prosecutor's approval, to treat a "wobbler" as a misdemeanor rather than as a felony. In People v. Superior Court (On Tai Ho), supra, 11 Cal.3d at pages 64-68, the court struck down a law (former § 1000.2) permitting a prosecutor to veto a court's decision to divert a defendant charged with a narcotics offense to a pretrial program of treatment and rehabilitation. (See also People v. Clay, supra, 18 Cal. App.3d *513 at pp. 967-970 [relying on Tenorio to invalidate a statute (former § 1203) permitting the court to grant probation in certain cases only with the concurrence of the district attorney].) Following each of these decisions, the Legislature repealed the invalid statute or amended it to remove the provision purporting to give a prosecutor the power to veto a judicial decision.^[5]

(2b) In construing the Three Strikes law we cannot ignore the closely relevant holding of People v. Tenorio, supra, 3 Cal.3d 89, because we must give the law a constitutional interpretation if that is reasonably possible. (See ante, p. 509.) The statute this court invalidated in Tenorio provided that "no allegation of fact which, if admitted or found to be true, would change the penalty for the offense charged from what the penalty would be if such fact were not alleged and admitted or proved to be true may be dismissed by the court or stricken from the accusatory pleading except upon motion of the district attorney." (Former Health & Saf. Code, § 11718.) The applicable provision of the Three Strikes law (§ 667(f)(2); § 1170.12, subd. (d)(2)), if construed as the district attorney would have us construe it, would have precisely the same effect: A court that was convinced, in the proper exercise of its discretion, that justice demanded the dismissal of a prior felony conviction allegation pursuant to section 1385, would have no power to dismiss unless the prosecutor consented. So interpreted, the statute would appear to violate the doctrine of separation of powers.^[6]

The district attorney, and amici curiae supporting his position, argue the Three Strikes law can be construed as barring a court from dismissing prior felony conviction allegations sua sponte pursuant to section 1385 without violating the separation of powers doctrine. The argument may be summarized as follows: The Legislature may completely eliminate a trial court's power to strike prior felony allegations. (People v. Thomas, supra, 4 Cal.4th at pp. 210-211; People v. Valencia (1989) 207 Cal. App.3d 1042, 1045 [255 Cal. Rptr. 180]; cf. People v. Tanner (1979) 24 Cal.3d 514, 519, fn. 3 [156 Cal. Rptr. 450, 596 P.2d 328].) If the Legislature, having eliminated that *514 power, chooses to exercise additional control over the criminal process by subjecting the prosecutor's charging discretion to judicial oversight, then that additional step does not violate the separation of powers. The Three Strikes law, to continue the argument, can be interpreted as having such an effect: It requires a prosecutor to plead and prove all known prior felony convictions (see § 667(f)(1); § 1170.12, subd. (d)(1)), but permits the prosecutor to ask the court to strike any prior felony conviction allegations on which the prosecutor, in furtherance of justice or for insufficient evidence, does not wish to proceed (see § 667(f)(2); § 1170.12, subd. (d)(2)). The combined effect of these provisions, to conclude the argument, amounts to judicial oversight of the prosecutor's charging discretion rather than a limitation on the court's power to strike, and enhances judicial power rather than restricting it.

This view of the statute is impossible to accept. To describe the statute as subjecting the prosecutor's charging discretion to judicial oversight is sophistic. The statute does not purport to require the court to oversee the prosecutor's charging decisions. Nor does the court, in reality, exercise any power over the prosecutor's charging decisions. Any decision to dismiss is necessarily made after the prosecutor has invoked the court's jurisdiction by filing criminal charges. "[O]nce the state is ready to present its case in a judicial setting, `the prosecutorial die has long since been cast.'" (People v. Superior Court (Greer) (1977) 19 Cal.3d 255, 263 [137 Cal. Rptr. 476, 561 P.2d 1164], quoting People v. Superior Court (On Tai Ho), supra, 11 Cal.3d at p. 650.) In comparison, the restriction on the court's power to dismiss is real: Construing the law as the district attorney construes it, the court may not dismiss or strike a prior felony allegation except on the prosecutor's motion.

The notion that a statute with the effect described may be construed and justified as dealing with charging discretion, rather than with the court's disposition of pending charges, was expressly and flatly rejected in People v. Tenorio, supra, 3 Cal.3d at page 94 (see ante, p. 511): "When the decision to prosecute has been made, the process which leads to acquittal or to sentencing is fundamentally judicial in nature." (See also People v. Superior Court (On Tai Ho), supra, 11 Cal.3d at p. 66 ["[W]hen the jurisdiction of a court has been properly invoked by the filing of a criminal charge, the disposition of that charge becomes a judicial responsibility."]; Esteybar v. Municipal Court, supra, 5 Cal.3d at p. 127 [same].)

The Attorney General suggests the Three Strikes law serves the purpose of the separation of powers doctrine by making the decision to dismiss under section 1385 a "joint" decision, in the sense that the court and the prosecutor *515 each may veto the other's preferred disposition. The restriction on the prosecutor's charging discretion contained in the Three Strikes law (see § 667(f)(1) [requiring the prosecutor to "plead and prove" all prior felony convictions]), the Attorney General argues, distinguishes the Three Strikes law from the statute involved in People v. Tenorio, supra, 3 Cal.3d 89, which limited the court's power without also limiting the prosecutor's charging discretion. This view of the statute, however, does not avoid