Cal. Water Code § 75051

The notice of the bond election shall designate a name for the improvement district and describe the boundaries thereof. The notice shall also designate the respective election precincts and the polling place in each, the election officers, the time of the election, and the hours during which the polls will be kept open; provided, that the polls shall be opened not later than 8 o'clock a.m. and kept open until 7 o'clock p.m.