See Full Constitution
Article III, A
Section 5. Concurring in amendments; conference committee reports
No amendment to bills by one House shall be concurred in by the other, except by the vote of a majority of the members elected thereto, taken by yeas and nays, and the names of those voting for and against recorded upon the journal thereof; and reports of committees of conference shall be adopted in either House only by the vote of a majority of the members elected thereto, taken by yeas and nays, and the names of those voting recorded upon the journals.