(a) Territory may not be annexed to the district unless:
(1) an election is held in accordance with this subchapter; and
(2) the annexation is approved by a majority of the voters voting in the election in:
(A) the district; and
(B) the territory proposed to be annexed.
(b) If the territory is annexed to the district, a certified copy of the order canvassing the returns of the election shall be filed and recorded in the deed records.

(c) The failure of an election under this subchapter does not prohibit subsequent elections for the same purpose. A confirmation election may not be held under this subchapter before the first anniversary of the date of an election previously held under this subchapter.