Tex. Water Aux. Laws § 7825

Any person who acquired property in said district after the first day of January of the preceding year may vote in said election upon taking the following oath before the presiding judge of the polling place where he offers to vote, and such judge is authorized to administer same: "I do solemnly swear that I am a qualified voter of .......... County and that I am a resident property taxpayer of the proposed district, that I was not subject to pay property tax in said district for the preceding year and have not voted before at this election."