@chad

The paid (up to) three hours is only if the hours of work do not allow for three consecutive hours available to leave in order to vote.

As polls are open from 10 AM to 8 PM a person that works 9 AM to 5 PM has three consecutive hours after work in which to vote.

Someone, such as a nurse, that works 7 AM to 7 PM would be entitled to two hours paid to leave at 5 PM to vote.

See section 58 of the Local Authorities Election Act.

https://www.canlii.org/en/ab/laws/stat/rsa-2000-c-l-21/latest/rsa-2000-c-l-21.html