MULLARKEY, Justice.
This case involves the defendant’s speedy trial rights under the Interstate Agreement on Detainers (IAD), section 24-60-501, 10 C.R.S. (1982). The district court dismissed four criminal charges against the defendant, Gordon H. Allen, because of the People’s failure to bring the defendant to trial within 120 days of his arrival in Colorado as required by IAD Article IV(c). The People filed a motion for reconsideration, which was denied. The People now ap[74]*74peal1 from the order denying reconsideration. We affirm.
I.
A brief explanation of the IAD speedy trial requirements is necessary to put this case in context. After a detainer is filed, the IAD permits both the prisoner and the prosecuting authority which filed the de-tainer to initiate proceedings to bring the prisoner to trial. Different speedy trial periods apply to the two types of proceedings. If the prosecuting authority initiates the proceedings, trial must be held within 120 days after the prisoner arrives in the jurisdiction seeking to try him. IAD, Art. IY(c). If the prisoner requests final disposition of the charges, he must be tried within 180 days after the prosecution and the appropriate court are notified of his request. IAD, Art. 111(a). In either instance, the court may grant a reasonable or necessary continuance for good cause shown. IAD, Arts. 111(a) and IV(c).
In the present case, on January 5, 1985, the Jefferson County district attorney lodged a detainer against the defendant, who was incarcerated in a federal penitentiary in Wisconsin. Two days later, the defendant was notified that a detainer had been lodged against him. On May 10, 1985, the district attorney initiated proceedings to have the defendant returned to Colorado by sending the warden of the federal penitentiary a request for temporary custody of the defendant pursuant to IAD Article IV(a).
On June 18,1985, after having been notified of the district attorney’s request for temporary custody, the defendant requested final disposition of the charges underlying the detainer pursuant to IAD Article 111(a). On the same day, the federal authorities notified the district attorney and the court of the defendant’s request and informed the district attorney that his request for temporary custody had been approved. The federal authorities offered to deliver temporary custody of the defendant to an appropriate authority in Colorado and the defendant arrived in Colorado on July 12, 1985. He appeared in county court on July 15, 1985, and an attorney was appointed to represent him. On August 26, 1985, the defendant, his attorney, and the district attorney appeared in district court for arraignment. The judge suggested a trial date of January 28, 1986. Both attorneys said that January 28 would be “fine.” No mention was made of the detainer, the defendant’s request for disposition of charges, the district attorney’s request for temporary custody, or the time requirements under the IAD. January 28 was well beyond both the 180-day time limit of Article III and the 120-day time limit of Article IV.
On September 9, 1985, the district judge informed the district attorney that there was a detainer problem. The district attorney discussed the matter with defense counsel, but neither attorney made any effort to reset the trial. On November 4, 1985, the district judge set the case for hearing on her own motion. The judge’s expressed purpose was to set a trial date within the speedy trial limit of the IAD. She set the trial for November 26, 1985, and, in response to a question from the defendant’s attorney, stated that all motions should be filed by November 12. The defendant’s attorney2 and the prosecutor both agreed to this schedule, which was within the 180-day period of Article III but beyond the 120-day period of Article IV.
On November 12, 1985, 120 days after his arrival in Colorado, and the last day on which he was allowed to file motions, the defendant filed, inter alia, a motion to dismiss based on the prosecution’s failure to bring him to trial within the 120-day [75]*75period of IAD Article IV. After a hearing, the judge found that the time limits of Article IV applied to this action. She rejected the People’s primary argument, that defense counsel’s question about the motions date at the November 4,1985, hearing had been a request for a continuance. Concluding that the prosecution had failed to meet its burden of assuring compliance with the IAD, she orally dismissed the charges against the defendant. A written order dismissing the charges was entered on November 25.
On December 6, 1985, the People moved for reconsideration, arguing that the defendant had known that the judge was setting the trial beyond the speedy trial period of IAD Article IV and had not said anything. The People contended that this amounted to “gamesmanship,” waiver, and “trial by ambush.” On March 7, 1986, the district court held a hearing on the People’s motion for reconsideration. The judge found that at the November 4, 1985, hearing, the defendant’s attorney had not known about the district attorney’s Article IV request for temporary custody. Accordingly, the judge concluded that the defendant’s attorney had not deceived the trial court, and she denied the motion for reconsideration. The People appeal from the denial of the motion for reconsideration.3
II.
As a threshold issue, the trial court considered whether the speedy trial limit of Article III or Article IV controlled this case. The district attorney conceded that this was an Article IV case and the trial court agreed, relying on United States v. Mauro, 436 U.S. 340, 356 n. 24, 98 S.Ct. 1834, 1845 n. 24, 56 L.Ed.2d 329 (1978). The district attorney did not appeal this issue and it is not before us. We are asked to decide only whether the defendant waived his procedural right to be tried within 120 days of his arrival in Colorado.
III.
The protections of the IAD are designed to “facilitate a defendant’s rehabilitation in prison and to avoid disruptions caused when charges are outstanding against the prisoner in another jurisdiction.” United States v. Black,4 609 F.2d 1330, 1334 (9th Cir.1979), cert. denied, 449 U.S. 847, 101 S.Ct. 132, 66 L.Ed.2d 56 (1980); see also Mauro, 436 U.S. at 359, 98 S.Ct. at 1846 (IAD enacted to prevent disruption to rehabilitation). Since the rights created by the IAD are statutory, rather than constitutional, waiver of those rights “must be voluntary, but need not be knowing and intelligent.” People v. Moody, 676 P.2d 691, 695 (Colo.1984); see also People v. Sevigny, 679 P.2d 1070, 1075 (Colo.1984); United States v. Odom, 674 F.2d 228, 230 (4th Cir.), cert. denied, 457 U.S. 1125, 102 S.Ct. 2946, 73 L.Ed.2d 1341 (1982); Black, 609 F.2d at 1334.
Even under the less stringent “vol-untariness” standard applicable to statutory rights, it is clear that mere silence by the defendant and his attorney when the trial date is set does not amount to waiver. See Sevigny, 679 P.2d at 1075; cf.
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MULLARKEY, Justice.
This case involves the defendant’s speedy trial rights under the Interstate Agreement on Detainers (IAD), section 24-60-501, 10 C.R.S. (1982). The district court dismissed four criminal charges against the defendant, Gordon H. Allen, because of the People’s failure to bring the defendant to trial within 120 days of his arrival in Colorado as required by IAD Article IV(c). The People filed a motion for reconsideration, which was denied. The People now ap[74]*74peal1 from the order denying reconsideration. We affirm.
I.
A brief explanation of the IAD speedy trial requirements is necessary to put this case in context. After a detainer is filed, the IAD permits both the prisoner and the prosecuting authority which filed the de-tainer to initiate proceedings to bring the prisoner to trial. Different speedy trial periods apply to the two types of proceedings. If the prosecuting authority initiates the proceedings, trial must be held within 120 days after the prisoner arrives in the jurisdiction seeking to try him. IAD, Art. IY(c). If the prisoner requests final disposition of the charges, he must be tried within 180 days after the prosecution and the appropriate court are notified of his request. IAD, Art. 111(a). In either instance, the court may grant a reasonable or necessary continuance for good cause shown. IAD, Arts. 111(a) and IV(c).
In the present case, on January 5, 1985, the Jefferson County district attorney lodged a detainer against the defendant, who was incarcerated in a federal penitentiary in Wisconsin. Two days later, the defendant was notified that a detainer had been lodged against him. On May 10, 1985, the district attorney initiated proceedings to have the defendant returned to Colorado by sending the warden of the federal penitentiary a request for temporary custody of the defendant pursuant to IAD Article IV(a).
On June 18,1985, after having been notified of the district attorney’s request for temporary custody, the defendant requested final disposition of the charges underlying the detainer pursuant to IAD Article 111(a). On the same day, the federal authorities notified the district attorney and the court of the defendant’s request and informed the district attorney that his request for temporary custody had been approved. The federal authorities offered to deliver temporary custody of the defendant to an appropriate authority in Colorado and the defendant arrived in Colorado on July 12, 1985. He appeared in county court on July 15, 1985, and an attorney was appointed to represent him. On August 26, 1985, the defendant, his attorney, and the district attorney appeared in district court for arraignment. The judge suggested a trial date of January 28, 1986. Both attorneys said that January 28 would be “fine.” No mention was made of the detainer, the defendant’s request for disposition of charges, the district attorney’s request for temporary custody, or the time requirements under the IAD. January 28 was well beyond both the 180-day time limit of Article III and the 120-day time limit of Article IV.
On September 9, 1985, the district judge informed the district attorney that there was a detainer problem. The district attorney discussed the matter with defense counsel, but neither attorney made any effort to reset the trial. On November 4, 1985, the district judge set the case for hearing on her own motion. The judge’s expressed purpose was to set a trial date within the speedy trial limit of the IAD. She set the trial for November 26, 1985, and, in response to a question from the defendant’s attorney, stated that all motions should be filed by November 12. The defendant’s attorney2 and the prosecutor both agreed to this schedule, which was within the 180-day period of Article III but beyond the 120-day period of Article IV.
On November 12, 1985, 120 days after his arrival in Colorado, and the last day on which he was allowed to file motions, the defendant filed, inter alia, a motion to dismiss based on the prosecution’s failure to bring him to trial within the 120-day [75]*75period of IAD Article IV. After a hearing, the judge found that the time limits of Article IV applied to this action. She rejected the People’s primary argument, that defense counsel’s question about the motions date at the November 4,1985, hearing had been a request for a continuance. Concluding that the prosecution had failed to meet its burden of assuring compliance with the IAD, she orally dismissed the charges against the defendant. A written order dismissing the charges was entered on November 25.
On December 6, 1985, the People moved for reconsideration, arguing that the defendant had known that the judge was setting the trial beyond the speedy trial period of IAD Article IV and had not said anything. The People contended that this amounted to “gamesmanship,” waiver, and “trial by ambush.” On March 7, 1986, the district court held a hearing on the People’s motion for reconsideration. The judge found that at the November 4, 1985, hearing, the defendant’s attorney had not known about the district attorney’s Article IV request for temporary custody. Accordingly, the judge concluded that the defendant’s attorney had not deceived the trial court, and she denied the motion for reconsideration. The People appeal from the denial of the motion for reconsideration.3
II.
As a threshold issue, the trial court considered whether the speedy trial limit of Article III or Article IV controlled this case. The district attorney conceded that this was an Article IV case and the trial court agreed, relying on United States v. Mauro, 436 U.S. 340, 356 n. 24, 98 S.Ct. 1834, 1845 n. 24, 56 L.Ed.2d 329 (1978). The district attorney did not appeal this issue and it is not before us. We are asked to decide only whether the defendant waived his procedural right to be tried within 120 days of his arrival in Colorado.
III.
The protections of the IAD are designed to “facilitate a defendant’s rehabilitation in prison and to avoid disruptions caused when charges are outstanding against the prisoner in another jurisdiction.” United States v. Black,4 609 F.2d 1330, 1334 (9th Cir.1979), cert. denied, 449 U.S. 847, 101 S.Ct. 132, 66 L.Ed.2d 56 (1980); see also Mauro, 436 U.S. at 359, 98 S.Ct. at 1846 (IAD enacted to prevent disruption to rehabilitation). Since the rights created by the IAD are statutory, rather than constitutional, waiver of those rights “must be voluntary, but need not be knowing and intelligent.” People v. Moody, 676 P.2d 691, 695 (Colo.1984); see also People v. Sevigny, 679 P.2d 1070, 1075 (Colo.1984); United States v. Odom, 674 F.2d 228, 230 (4th Cir.), cert. denied, 457 U.S. 1125, 102 S.Ct. 2946, 73 L.Ed.2d 1341 (1982); Black, 609 F.2d at 1334.
Even under the less stringent “vol-untariness” standard applicable to statutory rights, it is clear that mere silence by the defendant and his attorney when the trial date is set does not amount to waiver. See Sevigny, 679 P.2d at 1075; cf. Harrington v. District Court, 192 Colo. 351, [76]*76354, 559 P.2d 225, 228 (1977) (waiver of right to speedy trial under Title 18). Instead, “a defendant must either expressly waive his statutory right to a speedy trial or else affirmative conduct evidencing such a waiver must be shown.” People v. Abeyta, 195 Colo. 338, 340, 578 P.2d 645, 646 (1978) (waiver of speedy trial rights under Crim.P. 48(b)).
For example, a defendant can waive his IAD rights by failing to assert them prior to or during trial. See Moody, 676 P.2d at 695; United States v. Eaddy, 595 F.2d 341, 346 (6th Cir.1979). An affirmative request by defense counsel for a trial date beyond the speedy trial period can be sufficient to waive the defendant’s statutory rights. See People v. Mascarenas, 666 P.2d 101, 106 (Colo.1983) (defendant had actively participated in delay and had requested four continuances); People v. Fetty, 650 P.2d 541 (Colo.1982). Other affirmative requests for treatment inconsistent with the IAD can also result in waiver. Compare Gray v. Benson, 608 F.2d 825, 827 (10th Cir.1979) (by requesting a transfer after entering his plea, defendant waived anti-shuttling provision) with Eaddy, 595 F.2d at 344-45 (failure to state preference as to where defendant should be held pending trial did not waive anti-shuttling provisions).
The district attorney contends that in the case now before us the defendant waived his IAD speedy trial rights by participating in two trial settings which resulted in trial dates beyond the 120-day limitation.5 We recently reiterated that a defendant may waive his speedy trial rights under the Uniform Mandatory Disposition of Detain-ers Act (Uniform Act)6 “by freely acquiescing in a trial date beyond the ninety-day speedy trial period imposed by section 16-14-104[, 8A C.R.S. (1986)].” Martin v. People, 738 P.2d 789, 792 (Colo.1987) (footnote omitted). We explained that “[t]his waiver concept, however, is based on the fact that a defendant’s participation in selecting a trial date would contribute directly to any violation of the ninety-day provision. In that circumstance, the defendant has an opportunity to cure the statutory defect by promptly raising the issue.” Id.
Here, we cannot say that the defendant’s acquiescence in the two trial dates directly contributed to the speedy trial violation. Instead, as in Sevigny, the trial was set beyond the time allowed by statute because the “prosecution was unaware of the precise character of the defendant’s speedy trial rights and failed to comply with its obligations under the Interstate Agreement.” 679 P.2d at 1076 (footnote omitted).7 The defendant did not have [77]*77to demand that the prosecutor and the court comply with the IAD, as long as he did not affirmatively request that they follow a procedure inconsistent with it. See Eaddy, 595 F.2d at 345; cf. Odom, 674 F.2d at 230 (defendant waived 120-day limit by seeking continuance). The burden of satisfying the speedy trial requirements of the IAD was on the prosecutor and the trial court. See generally S.Rep. No. 1356, 91st Cong., 2d Sess. (1970), reprinted in 1970 U.S. Code Cong. & Admin.News 4864, 4865-66 (when prosecutor initiates IAD proceedings, “[t]rial must be commenced within 120 days of the time the prisoner arrives ... unless the time is extended for good cause”).
While our prior cases have not explicitly addressed the prosecutor’s burden in an Article IV proceeding, we have repeatedly explained that the burden of assuring compliance with statutory time limits is on the district attorney and the trial court. For example, we have explained that in an Article III proceeding, “once the speedy trial period has been triggered by a proper notice from the prisoner, the burden of compliance is on the district attorney and the trial court.” Sevigny, 679 P.2d at 1074; accord, Gibson v. Klevenhagen, 777 F.2d 1056, 1058 & n. 5 (5th Cir.1985) (receiving state has duty to see that prisoner is brought to trial within prescribed period); cf. People v. Swazo, 199 Colo. 486, 490, 610 P.2d 1072, 1074 (1980) (“burden for compliance with the time requirements [of the Uniform Act] is on the prosecution”); People v. Lopez, 41 Colo.App. 206, 209, 587 P.2d 792, 795 (1978) (“the burden of compliance with statutory time requirements is on the prosecution and the trial court”). Similarly, we have adopted the rule, first set forth by the court of appeals, that the receiving state must bear the burden of assuring that the sending state notifies the prisoner that a detainer has been lodged. Romans v. District Court, 633 P.2d 477 (Colo.1981). Quoting from People v. Lincoln, 42 Colo.App. 512, 516, 601 P.2d 641, 644 (1979), we said in Romans:
The purpose of the Agreement requires that the adverse consequences of official oversights be visited upon the prosecution, not upon the prisoner. ...
The receiving state, having set the provisions of the Agreement in motion, must bear the burden of assuring that its provisions are enforced in the sending state.
633 P.2d at 481 (citations omitted).8
In the cases cited above, we held that the language and purposes of the statute required the burden of compliance to be placed on the prosecutor, even though he had no actual control over the critical events. For example, it is the action of the defendant, not the prosecution, which sets in motion the 180-day speedy trial period in an Article III proceeding. Similarly, the official of the sending state who has custody of the prisoner, not the receiving state’s prosecutor, has control over whether the defendant receives the prompt notice required by Article III(c). By contrast, in an Article IV proceeding such as the one now before us, the prosecutor has control over when the time begins running because his request for temporary custody triggers the speedy trial period. Therefore, we hold that his burden of compliance includes the duty to keep track of the proceeding, to make the court aware of the time limits and other requirements of the IAD, and to assure that the trial date is timely. Due to the unfortunate combination of circumstances which occurred in this case, neither the judge nor defense counsel was aware of the district attorney’s request for tempo[78]*78rary custody.9 While this fact is not dis-positive, it illustrates a practical reason for requiring the prosecutor to follow up on IAD requests.
In this case, rather than the district attorney informing the court of the detainer problem, the trial court discovered the problem on its own, and informed the district attorney. When the district attorney did nothing to change the trial date, the trial court, on its own motion, called a hearing for the purpose of setting a new trial date to avoid speedy trial problems under the IAD. It was evident to all participants that the trial judge, after reviewing the court’s file, thought this was an Article III case, subject to the 180-day time period.10 The trial court made every effort to meet its obligations under the IAD. The district attorney had a duty to inform the court that he had initiated Article IV proceedings in this case and that Article IV triggered the shorter 120-day limitation. He should not have stood by silently while the judge set a trial date outside that time period.
In conclusion, the district attorney’s inaction, particularly in light of the trial court’s repeatedly bringing this issue to his attention, did not satisfy his burden of assuring compliance with the IAD. The defendant’s conduct agreeing to two trial dates beyond the 120-day time period was not sufficient to support a finding of waiver. Under these facts, we find that the People failed to comply with the IAD. The requirements of the IAD are mandatory. See Hughes v. District Court, 197 Colo. 396, 401, 593 P.2d 702, 705 (1979). Dismissal with prejudice of the charges against the defendant is required under IAD Article V(c).
IV.
For the reasons given above, we conclude that the defendant’s right to a speedy trial under the IAD was violated and that dismissal of the charges against him was required. Therefore, we affirm.
VOLLACK, J., dissents, and ROVIRA, J., joins in the dissent.