dissenting.
¶11 Today the majority holds that Amendment 64 retroactively reaches back to remove the People’s ability to prosecute acts that were illegal at the time they were committed. The majority carefully avoids using the term “retroactive” (except when it cannot, as in the certiorari question upon which this court granted, see maj. op. ¶ 2, n.1). Such avoidance, however, cannot obscure the import of its ruling—namely, that criminal acts committed prior to Amendment 64’s effective date will go unprosecuted and unpunished. Yet the plain language of Amendment 64 provides that it “shall become effective upon official declaration of the vote hereon by proclamation of the governor”—which, in this case, occurred on December 10, 2012. The criminal acts at issue in the cases before this court today occurred before that date, and thus were illegal at the time they were committed.1 Because nothing in Amendment 64 suggests that it retroactively removes the People’s authority to prosecute individuals for such illegal activity, I respectfully dissent.
¶12 Amendment 64 declares that, “[n]otwithstanding any other provision of law,” the possession, use, display, purchase, or transport of one ounce or less of marijuana “are not unlawful and shall not be an offense under Colorado law ... for persons twenty-one years of age or older.” Colo. Const. art. XVIII, § 16(3)(a) (emphasis added). As made clear by its language, Amendment 64 is written in the present tense. See Jackson v. State, 966 P.2d 1046, 1052 (Colo. 1998) (finding amendment applied prospectively on the ground that “shall” generally refers to the future). Nothing in the Amendment suggests that offenses committed prior to the Amendment are somehow deemed non-offenses or non-proseeutable. On the contrary, the “notwithstanding” clause is an express recognition that prior to Amendment 64, such activity was illegal.
¶18 This understanding is confirmed by section 16(9) of the measure, which provides: “Effective date: ... [A]ll provisions of this section shall become effective upon official declaration of the vote hereon by proclamation of the governor, pursuant to section 1(4) of article V.” Colo. Const. art. XVIII, § 16(9). Section 1(4) in turn provides that measures initiated by the people “shall take effect from and after the date of the official declaration of the vote thereon by proclamation of the governor_” Colo. Const, art. V, § 1(4) (emphasis added). The governor’s proclamation in this case occurred on December 10, 2012. In sum, Amendment 64 declares that from and after December 10, 2012, possession of one ounce or less of marijuana is legal. It does nothing to change the illegal status of marijuana possession prior to that *759date, and in fact expressly recognizes that such conduct was illegal prior to that date.
¶14 Our task is to determine what the voters intended in passing Amendment 64. When interpreting a constitutional amendment, “our goal is to determine and give effect to the will of the people in adopting the measure.” Huber v. Colo. Mining Ass’n, 264 P.3d 884, 889 (Colo. 2011). Indeed, “[ujnless the terms of a constitutional amendment clearly show the intent that it be applied retroactively, we presume the amendment has prospective application only.” Id. (citing Jackson, 966 P.2d at 1052). Here, there is no indication whatsoever that the voters intended the Amendment to apply retroactively, much less language “clearly show[ing]” an intent that it do so. On the contrary, the will of the people, as adjudged by the language they adopted, manifests an intent that the legalization of marijuana possession apply prospectively only.
¶15 The defendants in the cases before this court today each committed acts that were illegal at the time they were committed.2 The defendants are therefore subject to prosecution for those acts. See § 18-1-201(1)(a), C.R.S. (2016) (“A person is subject to prosecution in this state for an offense which he commits ... if [t]he conduct constitutes an offense and is committed either wholly or partly within the state.”); see also § 16-2.5-132, C.R.S. (2016) (a district attorney’s authority “shall include the enforcement of all laws of the state of Colorado”); People v. District Court, 632 P.2d 1022, 1024 (Colo. 1981) (a prosecutor has the “duty to prosecute persons for violations of the criminal laws” and “has a broad discretion in the performance of [his or her] duties”). Because marijuana possession “constitute[d] an offense” prior to the effective date of Amendment 64, the defendants are properly subject to prosecution for that offense.
¶16 The majority concludes otherwise, holding that Amendment 64 somehow deprived prosecutors of the ability to prosecute previously illegal conduct as of December 10, 2012.3 The majority reasons that because Amendment 64 made possession of one ounce or less of marijuana legal, and superseded that portion of section 18-18-406(1)4 that made such possession illegal, “once Amendment 64 became effective the State no longer had the authority under [the provision making possession illegal] to prosecute Boyd on appeal.” Maj. op. ¶ 6. For this argument, the majority relies exclusively on United States v. Chambers, 291 U.S. 217, 54 S.Ct. 434, 78 L.Ed. 763 (1934), which dealt with the repeal of Prohibition and the Eighteenth Amendment to the U.S. Constitution. There, the Supreme Court held that “[i]n case a statute is repealed or rendered inoperative, no further proceedings can be had to enforce it in pending prosecutions unless competent authority has kept the statute alive for that purpose.” Chambers, 291 U.S. at 223, 54 S.Ct. 434 (emphasis added). Importantly, the majority in this case cuts off the underlined portion of the sentence in its opinion. Maj. op. ¶ 8. But this is its critical error, as Amendment 64 is itself the “competent authority” that has kept existing law “alive.”
¶17 In Chambers, the Court noted that “[u]pon the ratification of the Twenty-First Amendment the Eighteenth Amendment at once become inoperative,” and Congress had no authority “to extend the operation of those provisions.” Id. at 222, 224, 54 S.Ct. 434 (emphasis added). By contrast, the provisions *760of Amendment 64, by their own terms, did not go into effect until December 10, 2012. The Amendment expressly preserved the illegality—and hence the prosecutability—of marijuana possession past the date of its adoption.
¶18 The fundamental problem with the majority opinion is that it gives little meaning to the effective date language contained in Amendment 64. It would make no sense for the Amendment to recognize the continued illegality, and hence prosecutability, of marijuana possession up to December 10, 2012, but then somehow remove that authority once the Amendment became effective, as the majority seems to suggest. Indeed, in two of the three cases before the court today (in this ease and Russell v. People, 2017 CO 3, 387 P.3d 750, the majority retroactively voids convictions for marijuana possession that occurred prior to December 10, 2012.5 And although the majority takes an assiduous pass on the effect of its ruling on post-conviction matters, see maj. op. ¶ 2, n.1, its rationale—namely, that prosecutors had no authority to prosecute marijuana possession crimes after December 10, 2012—would apply equally to vacate all marijuana possession convictions, not just those still pending on direct review. Neither the language of Amendment 64, nor a citation to the inappo-site Chambers case, can cany such enormous weight.
¶19 In the end, our task is to “assess[ ] the intent of the voters” by “look[ing] to the language of the text....” Bruce v. City of Colo. Springs, 129 P.3d 988, 992 (Colo. 2006). Here, we must assess the intent of the voters who approved Amendment 64—not those who approved the Twenty-First Amendment to the U.S. Constitution as in Chambers, or any other measure for that matter. Because the text of Amendment 64 expressly recognizes the continuing illegality of marijuana possession through December 10, 2012, and hence the authority to prosecute such possession, I would reverse the court of appeals’ decision vacating Boyd’s conviction.
I am authorized to state that JUSTICE COATS and JUSTICE HOOD join in this dissent.
. In this case, respondent Pamela Kathleen Boyd was convicted on August 8, 2012, based on a criminal act that occurred on October 27, 2011. In Russell v. People, 2017 CO 3, 387 P.3d 750, petitioner/cross-respondent Brandi Jessica Russell was convicted on June 24, 2011, based on a criminal act that occurred on March 24, 2010. In People v. Wolf, 2017 CO 4, 387 P.3d 753, respondent Alexander L. Wolf was convicted on July 31, 2013, based on a criminal act that occurred on September 25, 2012.
. See supra n.1.
. Interestingly, the majority does not even mention the rationale proffered by the court of appeals—namely, that a court must give retroactive effect to legislation that mitigates the penalty for a crime under People v. Thomas, 185 Colo. 395, 525 P.2d 1136 (1974). See People v. Boyd, 2014 COA 109, ¶ 19, 383 P.3d 44; People v. Russell, 2014 COA 21M, ¶ 12, — P.3d -; People v. Wolf, No. 13CA2110 slip. op. at 15-19, 2015 WL 4573017 (Colo. App. July 30, 2015). Apparently it finds that rationale unconvincing, as do I. As pointed out by the dissenting judges in Boyd and Wolf, to the extent that Thomas has continuing validity, it has no application in the constitutional amendment context, where the court's duty is to interpret the intent of the voters adopting the measure through examination of its language, which in this case reveals no retroactive intent. Boyd, 2015 COA 109, ¶¶ 97-98, — P.3d — (Bernard, J., dissenting); Wolf, slip. op. at 25 (Dailey, J., dissenting).
.Section 18-18-406(1), C.R.S. (2011), made illegal the possession of two ounces or less of marijuana as a class 2 petty offense.
. See supra n.1.