You may have seen management's email this week on getting administrative leave to go vote. The NTEU Collective Bargaining Agreement specifies in Article 23, Section 2, that you "may arrive for work three hours after the polls are open or leave work three hours before the polls close, whichever requires the lesser amount of time." And if this general rule does not allow you sufficient time to vote, you "may be excused for such additional time as may be needed to enable [you] to vote."
You must let your supervisor know in advance, however.
Below is the full text of the All-Hands email: