When is the president of the senate allowed to vote on legislative matters?

The president of the senate (which is also the vice-president at the same time) can only vote to break a tie, that is when there is the same number of votes in favour and against: his or her vote decides then.

This is what i found on google “eightin 1997, the mccaughey septuplets were born in carlisle, iowa. multiple births of as many as eight babies have been born alive, the first set on record to the chukwu family in texas in 1998; one died and seven survived. in 2009, a second set, the suleman octuplets, were born in bellflower, california.” i was surprised about this . i don’t want to have that many babies .