Colorado Revised Statutes Effective Dates Of Laws

Constitution Article 4, Section 11 and Article 5, Section 19 provide:

“Section 11. Bills presented to governor--veto--return.  Every bill passed by the general assembly shall, before it becomes a law, be presented to the governor.  If he approve, he shall sign it, and thereupon it shall become a law;  but if he do not approve, he shall return it, with his objections, to the house in which it originated, which house shall enter the objections at large upon its journal, and proceed to reconsider the bill.  If then two-thirds of the members elected agree to pass the same, it shall be sent, together with the objections, to the other house, by which it shall likewise be reconsidered, and if approved by two-thirds of the members elected to that house, it shall become a law, notwithstanding the objections of the governor.  In all such cases the vote of each house shall be determined by ayes and noes, to be entered upon the journal.  If any bill shall not be returned by the governor within ten days after it shall have been presented to him, the same shall be a law in like manner as if he had signed it, unless the general assembly shall by their adjournment prevent its return, in which case it shall be filed with his objections in the office of the secretary of state, within thirty days after such adjournment, or else become a law.”

“Section 19. When laws take effect--introduction of bills.  An act of the general assembly shall take effect on the date stated in the act, or, if no date is stated in the act, then on its passage.  A bill may be introduced at any time during the session unless limited by action of the general assembly.  No bill shall be introduced by title only.”


The Colorado Supreme Court in People v. Glenn, 1980, 615 P. 2d 700, 200 Colo. 416 , in construing these constitutional provisions, provides:

Art. IV, Sec. 11 , of course, provides two alternate methods through which a bill may ‘become a law,‘ viz., legislative override of a gubernatorial veto, and failure of the Governor to return a bill to the General Assembly within ten days of its presentment to him unless such return is prevented by the adjournment of the General Assembly.  ***[T]he language in Art. V Sec. 19 , to the effect that a legislative act ‘shall take effect on the date stated in the act‘ is limited to the situation in which the act ‘becomes a law‘ pursuant to Art. IV, Sec. 11 , prior to the stated effective date.”

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