delivered the Opinion of the Court.
In this case, we determine whether the prosecution may withdraw from a plea agreement in response to a defendant's successful motion for a reduction in sentence made in accordance with the provisions of the "boot camp" statute. See § 17-27.7-104(2), 6 C.R.S. (1999). The People contend, and the court of appeals agreed, that our decision of People ex rel. VanMeveren v. District Court,
I.
In 1996, Monte Dean Keller pleaded guilty to a count of theft, section 18-4-401(2)(c), 6 C.R.S. (1996), and to a separate count of aggravated motor vehicle theft, section 18-4-409(8)(a), 6 C.R.S. (1996). In return for his promise to plead guilty, the People stipulated to an eleven year sentence to the Department of Corrections (DOC) on the aggravated motor vehicle theft charge, which was to run concurrently with an eight year sentence on the theft charge. The plea agreement between the parties was not reduced to writing.
The trial court accepted Keller's pleas of guilty and sentenced him to concurrent terms of eleven and eight years in the DOC. After the court imposed sentence, the district attorney asserted that, by agreeing to a stipulated sentence, Keller had, in effect, waived his right to pursue Crim. P. 35(b) relief. Defense counsel agreed. In their arguments to this court, the People have sought to characterize these statements as an understood part of the plea agreement. However, based on the transcript of the sentencing proceedings and the People's arguments below, we find that there was no express agreement to limit the future availability of Crim. P. 35(b) consideration. Rather, it would appear that the district attorney's post-sentencing remarks merely reflected her belief that a sentence stipulation effectively forecloses Crim. P. 35(b) relief as a matter of law. This view of the district attorney's remarks is supported by the fact that, throughout the
*292
course of the proceedings below, the People have contended that our decision in People ex rel. VanMeveren v. District Court,
On July 11, 1997, the DOC notified Keller of his acceptance into the Regimented Inmate Training Program (RITP), a statutory alternative to imprisonment that allows inmates to participate voluntarily in a military-style boot camp aimed at promoting personal development and self-discipline. See §§ 17-27.7-101 to -102, 6 CRS. (1999). Keller enrolled in RITP and, by all accounts, excelled within the program 2 After completing the statutorily mandated period of service and training, see $ 17-27.7-102(8), Keller was "automatically referred to the sentencing court so that [he could] make a motion for reduction of sentence pursuant to rule 35b of the Colorado rules of criminal procedure." § 17-27.7-104(@2)(a), 6 CRS. (1999).
The trial court heard Keller's motion for a reduction of sentence on September 29, 1997, and granted the motion that same day. At the hearing, the People objected to the defendant's attempts to secure postconviction relief, arguing that, absent the prosecution's express approval, such relief was barred by VanMeveren. The trial court found the People's reliance on VanMeveren to be misplaced and ruled that Keller's successful participation in the boot camp program merited a three-year reduction in the governing sentence of eleven years. The trial court subsequently denied the People's motion for reconsideration and the People appealed. 3
The court of appeals, relying on both Van-Meveren and our recent decision in People v. Smith,
IL.
Our analysis commences with an overview of the statutory provisions implementing the boot camp program and proceeds to consider the meaning and operation of section 17-27.7-104(2)(a), the subsection that establishes the process by which participants in the program may petition the sentencing court for a reduction in sentence. We then compare the type of relief provided for under the boot camp statute with that which is available under Crim. P. 835(b) and conclude that section 17-27.7-104(2) establishes a special statutory procedure for seeking a reduction in sentence. The final phase of our analysis concerns our decision in Van-Meveren and the inapplicability of its reasoning to the case at bar. We hold that our *293 pronouncements in VanMeveren regarding the prosecution's right to withdraw from an accepted plea agreement after a trial court's grant of sentence reductions pursuant to Crim. P. 85(b) do not extend to sentence reductions ordered pursuant to the boot camp statute.
A.
The legislature established the boot camp program in order to effectuate reductions in the prison population and to promote personal development and self-discipline among felony offenders. See § 17-27.7-101; see also Smith,
Although section 17-27.7-104(2)(a) references Crim. P. 35(b), our examination of this procedural rule convinces us that the process provided for under section 17-27.7-104(2) is different, both in kind and substance, from that which typically accompanies a Crim. P. 85(b) application for reduction in sentence. 6 Notably absent from the operative provisions of the boot camp statute are the rigid time limitations set forth under Crim. P. 35(b). Aside from the procedural distinctions outlined in the language of the provisions, the nature of section 17-27.7-104(2) is distinct in that it sets forth a special statutory procedure available only under certain cireum-stances.
Substantively, the boot camp statute mandates automatic referral to the sentencing court for consideration of sentence reduction within "sixty days of termination or completion of the program." § 17-27.7-104(@2)(a). The sixty-day time limit contemplated by section 17-27.7-104(2)(a) does not restrict a defendant's ability to petition for such relief, as does the limitation in Crim. P. 85(b), but rather ensures that the process begins swiftly and advances expeditiously. 7 This comports with the boot camp statute's specifically stated purpose of "reducing prison *294 overcrowding" and "promoting ... the personal development and self-discipline" of offenders. § 17-27.7-101. To the extent that the sixty-day time limitation allows successful participants in the program to be immediately rewarded with sentence reductions, it is intended to reinforee positive behaviors and reduce burgeoning prison populations.
Thus, a defendant seeking a reduction in sentence pursuant to Crim. P. 85(b) and one seeking such a reduction pursuant to section 17-27.4-104(2)(a) are in different postures when prosecuting a motion for postconviction relief. Furthermore, judicial review of motions for reduction in sentence made pursuant to Crim. P. 85(b) differs significantly from the special statutorily defined procedures a sentencing court must follow when presented with a motion for reduction of sentence made pursuant to section 17-27.7-104(2)(a). For instance, section 17-27.7-104(2)(b) provides, in pertinent part, that:
The court may not summarily deny the offender's motion without a complete consideration of all pertinent information provided by the offender, the offender's attorney, and the district attorney. The court may issue an order modifying the offender's sentence and placing the offender on probation or in a community corrections program.
The process for reviewing postconviction motions submitted in accordance with section 17-27.7-104(2)(a) is both more extensive than the process provided for under Crim. P. 85(b) and less restrictive in terms of the time limitations governing its operation. Cf. People v. Ellis,
As we recently observed in Smith, a case in which we were asked to resolve a conflict between the boot camp statute and certain statutory sentencing provisions, the remedial features of the boot camp statute are designed to give sentencing courts the special authority to reconsider sentences to imprisonment based on evidence of "exemplary behavior in the RITP context."
In light of our conclusion that the boot camp statute establishes a special statutory procedure for submission and judicial consideration of motions seeking a reduction in sentence, we must next determine whether the court of appeals correctly concluded that . VanMeveren places limitations on a trial court's authority to order postconviction relief pursuant to the boot camp statute.
B.
VanMeveren concerned a defendant who had entered into a plea agreement containing a stipulation as to the sentencing range. The trial court approved the plea agreement and sentenced the defendant to a term of imprisonment in accordance with the stipulated range. The defendant thereafter sought, and was granted, a reduction in sentence pursuant to Crim. P. 35. The prosecution objected, complaining, in essence, that the reduction violated its agreement with the defendant.
One of the questions then before us on certiorari was: "Can the district attorney prevent the trial judge from modifying a
*295
sentence pursuant to [Crim. P. 85(b) ]
8
when the original sentence was imposed pursuant to a plea agreement?" - VanMeveren,
The case law authorities which permit a plea agreement to be enforced by a defendant may not be interpreted to foreclose the discretion of the trial judge or the obligations of the Executive or Legislative branches of government to carry out a correction program.
Id. at 37,
IIL
The case before us presents the question whether VanMeveren 's holding should apply in cases where a defendant under a stipulated sentence has petitioned for and received a reduction in sentence pursuant to section 17-27.7-104(2). The court of appeals concluded that VanMeveren controls the analysis of this case. The panel accordingly ordered that the case be remanded to the sentencing court so that the prosecution could be given the opportunity to withdraw from its agreement with Keller. We disagree with the court of appeals' analysis.
Reasoning from settled principles of law, we establish an appropriate framework for analyzing a district attorney's claim that she should be permitted to withdraw from an accepted plea agreement on the grounds that the defendant has violated its terms. Applying this framework to the instant case, we conclude that there exists no basis for allowing the district attorney to withdraw from the plea agreement.
A.
First, the VanMeveren decision was rendered with respect to a request for modification of sentence pursuant to Crim. P. 85(b). In Keller, the issue raised is specific to the boot camp statute, not the general sentence modification provisions of Crim. P. 85(b). As previously noted, we find that the boot camp statute is separate and distinct from Crim. P. 85(b) in both form and substance, and thus, are not inclined to follow the reasoning of VanMeveren in interpreting the effect of the boot camp statute sentence modification provision with respect to the plea agreement in this case.
Second, and more importantly, our more recent decisions with respect to plea agreements reflect our adherence to the general view that plea agreements are contractual in nature and should be interpreted in accordance with contract principles. See People v. Johnson,
The requirement that a defendant must be permitted to withdraw from a plea agreement that has been rendered invalid as a result of a trial court's constitutionally defective advisement does not, of course, compel the separate conclusion that a prosecutor should be allowed to withdraw from a plea agreement when a trial court has acted within its discretion to reduce a sentence originally imposed in accordance with a sentence stipulation.
9
Indeed, we have recognized only two bases for allowing the prosecution to withdraw from an accepted plea agreement: (1) where the parties have entered into a plea agreement that provides for an illegal sentence, see Chae,
We discussed the implications of a defendant's breach of an express condition of a plea agreement, and the prosecutor's remedy for such a breach, in White v. District Court,
Our reliance in VanMeveren upon a line of cases concerning inadequate advisements to determine when the prosecution may withdraw from a plea agreement is not in accord with our approach to these issues. Therefore, rather than reconstruct the analysis in VanMeveren and rely on unexpressed reasoning, we look to our decisions discussing the contractual nature of plea agreements for guidance in analyzing this case.
Finally, we note that our assertion in Van-Meveren that the result reached "affords the trial court the utmost discretion in the sentencing process" is inconsistent with our understanding of the respective roles of trial courts and prosecutors in the area of sen
*297
tencing. VanMeveren,
As we explain below, this court has recognized that contractual principles form the primary basis for allowing a prosecutor to withdraw from a plea agreement. Accordingly, to the extent that our pronouncements in VanMeveren are inconsistent with our. present approach, our holding in that case and its reasoning cannot guide our resolution of the issue now before us.
B.
The general rule subscribed to by virtually every court is that prosecutors are not permitted to withdraw from plea agreements after their acceptance. See 5 Wayne R. LaFave et al., COriminal Procedure § 21.2(F), at 95 (2d ed.1999); 2 Charles E. Torcia, - Wharton's - Criminal - Procedure § 312, at 392 (183% ed.1990). However, in recent years, courts have tempered this rule by allowing prosecutors to argue for withdrawal from an accepted plea agreement under a contractual theory of breach. See La-Fave, supra, § 21.5(e), at 212-18, 217; James E. Bond, Plea Bargaining and Guilty Pleas § 7.186), at 7-58 (2d ed.1983). In order for a court to conclude that withdrawal from the plea agreement and reinstatement of charges are warranted under the cireumstances, a district attorney must show that the ordered sentence reduction amounted to a material and substantial breach of the plea agreement. See, eg., McCormick,
When assessing a claim of breach, a reviewing court must begin by examining the plea agreement in an effort to determine its meaning. See Johnson,
IV.
We look to the terms of the plea agreement at issue in this case in order to decide whether the prosecutor may withdraw from its agreement with Keller. As previously mentioned, the plea agreement be
*298
tween Keller and the People was not reduced to writing. Our review of the relevant portions of the record convinces us that the agreement is silent as to the issue of sentence reduction. Although we have indicated that it is appropriate to look to the advisement for " 'extrinsic evidence relating to the cireumstances of the government's dealings with the defendant'" when confronted with ambiguity in the written plea documents, Craig,
The prosecution's statement that Keller had agreed, in effect, to waive future Crim. P. 35(b) consideration, although acquiesced to by defense counsel, cannot be regarded as part of the agreement, for no mention of that term was made before imposition of sentence. Yet, even if we were to conclude that the parties had reached an agreement concerning the future availability of Crim. P. 85(b) relief, we will not interpret the prosecution's statements regarding Crim. P. 35(b) so as to preclude Keller from seeking a reduction in sentence pursuant to section 17-27.7-104(2)(a) of the boot camp statute. The boot camp statute is a special statutory procedure for seeking a reduction in sentence.
We conclude that the plea agreement between the parties in this case did not contain a provision regarding the future availability of sentence reduction pursuant to the boot camp statute. Thus, we need not proceed further with our analysis to conclude that there has been no breach of the agreement. We accordingly hold that the prosecutor may not withdraw from the plea agreement.
V.
We hold that a prosecutor may not withdraw from a plea agreement containing a stipulated sentence when a trial court acts within its discretion to reduce the sentence pursuant to section 17-27.7-104(2) of the boot camp statute. We also conclude that the reasoning underlying our decision of VanMeveren has been supplanted by more recent decisions of this court concerning a prosecutor's right to withdraw from an accepted plea agreement. We therefore decline to apply VanMeveren to the issue before us. Applying settled principles of law, we conclude that the sentence stipulation contained in the plea agreement does not preclude Keller from seeking a reduction in sentence pursuant to the remedial provisions of the boot camp statute. Because the plea agreement did not foreclose the future possibility of a reduction in sentence, the ordered sentence reduction could not amount to a material and substantial breach of the plea agreement between the parties Absent a finding that Keller has materially and substantially breached the plea agreement, the district attorney cannot be allowed to withdraw from an accepted agreement and reini-tiate criminal proceedings. Accordingly, we reverse the judgment of the court of appeals and remand the case for further proceedings consistent with this opinion.
Notes
. See infra note 8.
. The "30-day Progress Report/Assessment" filed by a DOC representative is illustrative of Keller's early performance in the boot camp program. It states, inter alia, that "Recruit Keller is an active participant and leader within the classroom" and that "(hle is one of the top recruits in his platoon. ..." The performance evaluation submitted to the sentencing court after Keller completed boot camp is similarly laudatory and the court relied heavily on it in arriving at its decision to grant a reduction in sentence pursuant to section 17-27.7-104(2)(b), 6 C.R.S. (1999).
. Concerned that the time limits for filing an appeal from a final judgment would not be tolled during the pendency of its motion for reconsideration, the People sought interim appellate relief before a ruling on the pending motion could issue from the trial court. See People v. Adams,
. The precise issue on which we granted the petition for certiorari is as follows:
Whether the court of appeals erred in holding that, before a trial court may exercise its discretion by granting a Crim. P. 35(b) motion for reduction of sentence filed after a petitioner successfully completes boot camp, a trial court must first allow the district attorney to withdraw an accepted plea agreement under which the petitioner had been serving time in the Department of Corrections.
. Section 17-27.7-104(2) provides that:
(a) If an offender successfully completes a regimented training program, such offender, within sixty days of termination or completion of the program, shall automatically be referred to the sentencing court so that the offender may make a motion for reduction of sentence pursuant to rule 35b of the Colorado rules of criminal procedure.
(b) The department shall submit a report to the court concerning such offender's performance in the program. Such report may recommend that the offender be placed in a specialized probation or community corrections program. The court may not summarily deny the offender's motion without a complete consideration of all pertinent information provided by the offender, the offender's attorney, and the district attorney. The court may issue an order modifying the offender's sentence and placing the offender in a community corrections program.
. Crim. P. 35(b) reads:
The court may reduce the sentence provided that a motion for reduction of sentence is filed (1) within 120 days after the sentence is imposed, or (2) within 120 days after receipt by the court of a remittitur issued upon affir-mance of the judgment or sentence or dismissal of the appeal, or (3) within 120 days after entry of any order or judgment of the appellate court denying review or having the effect of upholding a judgment of conviction or sentence. The court may, after considering the motion and supporting documents, if any, deny the motion without a hearing. The court may reduce a sentence on its own initiative within any of the above periods of time.
. Although not in effect during the period in question here, section 17-27.7-104(2)(c)(D, 6 C.R.S. (1999), lends support to this view of the boot camp statute. That subsection states, in relevant part, that "[aluy motion filed pursuant to paragraph (a) of this subsection (2) shall be given priority for consideration by the sentencing court." § 17-27.7-104(2)(c)(D).
. At the time of our decision of VanMeveren, Crim. P. 35(a) contained the operative language granting trial courts the discretionary authority to reduce or modify sentences to imprisonment. In 1979, the sentence reduction provisions of Crim. P. 35(a) were excised and placed under a separate subsection (b) of the rule. See People v. Fuqua,
. Section 16-7-302(2), 6 C.R.S. (1999) and Crim. P. 32(d) specifically provide for a defendant's withdrawal from a plea agreement under certain circumstances. - Significantly, neither our statutes nor our rules of criminal procedure include provisions for the prosecution's withdrawal from a plea agreement. Section 16-7-302(3), however, provides that "[n]otwithstanding the reaching of a plea agreement ... the judge in every case should exercise an independent judgment in deciding whether to grant charge and sentence concessions." § 16-7-302(3), 6 C.R.S. (1999).
. This practice accords with the position taken by a number of other jurisdictions. See Humphrey v. State,
