Bill C-19

Opening period (2) The returning officer shall open a polling station established under subsection (1) for the days and hours during the period that begins on the 13th day before polling day and ends on polling day that the returning officer considers necessary to give electors residing in the institution or part of the institution, as the case may be, a reasonable opportunity to vote

There is no fixed limit as to when polling stations close.

Electoral Calendar and Voting Hours Non-application — definition of polling day 562 (1) The definition polling day in subsection 2(1) does not apply.

The term polling day will no longer have any meaning.

Emergency — extending voting hours (3) If voting at a polling station is interrupted on any day of the polling period by an emergency and the Chief Electoral Officer is satisfied that, if the voting hours at the polling station are not extended, a substantial number of electors will not be able to vote, the Chief Electoral Officer shall extend the voting hours at the polling station for the period the Chief Electoral Officer considers necessary to give those electors a reasonable opportunity to vote, as long as the polling station does not in any case (a) close later than midnight on any day of the polling period; or (b) remain open during the polling period for a total of more than 28 hours.

If a water main breaks, then bring out the suitcases!

Deadline for return of vote 229 The special ballot must be sent before the close of polling stations on the last day of the polling period and received by the special voting rules administrator in the National Capital Region no later than 6:00 p.‍m. on the Tuesday following the last day of the polling period in order to be counted.

239 (2) In order to have their special ballot counted, an elector whose application for registration and special ballot was accepted by the returning officer in the elector’s electoral district shall ensure that the ballot is sent before the close of polling stations on the last day of the polling period and is received by the special voting rules administrator in the National Capital Region no later than 6:00 p.‍m. on the Tuesday following the last day of the polling period. The special ballot shall be transmitted by (a) sending the sealed outer envelope to the returning officer by mail or any other means

Mail-in ballots sent out ON and DURING election day will count. And they don't even have to be sent in through the postal service.