Texas Local Government Code - LOC GOV'T § 375.244. Election to Approve Issuance of Bonds

(a) Bonds payable in whole or in part from taxes may not be issued unless approved by a majority or any larger percentage if required by the constitution of the qualified voters in the district voting at an election held for that purpose.

(b) Bonds payable from sources other than taxes may be issued by the board, and assessments may be levied without approval at an election.