Colo. Const. art. V, § 23
No amendment to any bill by one house shall be concurred in by the other nor shall the report of any committee of conference be adopted in either house except by a vote of a majority of the members elected thereto, taken by ayes and noes, and the names of those voting recorded upon the journal thereof.
Source: Entire article added, effective August 1, 1876, see L. 1877, p. 40.
Cross references: For the provision that amendments be printed before final vote, see § 22 of this article.