Wyo. Stat. § 28-1-101: President of senate to preside over joint sessions; powers.

Whenever the senate and house of representatives of the legislature of the state of Wyoming shall meet in joint session, for the transaction of any business whatsoever, the duly elected and qualified president of the senate shall preside over the deliberations of any such joint session, with all the prerogatives and powers of a presiding officer, and the officers of both the senate and house shall be, during such joint session, under and subject to his direction.