Originally Posted by sackett
The Senate rules require a senator to be physically present in order to vote.
A quorum is is required for voting - described as a simple majority of elected senators.
A majority of senators not required as a quorum is presumed unless an absence of a quorum is officially tabled.
A fifth of the senate is required to support the tabling for a suggestion of absence of a quorum.
A PDF of the rules as at March 26, 2020