California Code, Government Code - GOV § 57126

(a) Special elections called within all or any part of a landowner-voter district shall be governed by the general elections provisions of the principal act, so far as they may be applicable, relating to the qualifications of voters, the manner of voting, the form of the ballot, the duties of precinct and election officers, the canvassing of returns, and all other particulars. To the extent of any inconsistency between the provisions of this division and the principal act as determined by the commission, the provisions of this division shall control.

(b) Notwithstanding any other provision of law, special elections held pursuant to this division may be conducted wholly by mailed ballot on any date other than an established election date authorized by the elections official of the county or counties affected by the use of mailed ballots.