§ 9. A majority of each house shall constitute a quorum to do business. Each house shall determine the rules of its own proceedings, and be the judge of the elections, returns and qualifications of its own members; shall choose its own officers; and the senate shall choose a temporary president and the assembly shall choose a speaker.
Powers of each house
N.Y. Constitution § A3S9, under Legislature.
N.Y. Constitution § A3S9