Tex. Election Code § 18.001

(a) Before the beginning of early voting for the first election held in a county in each voting year, the registrar shall prepare for each county election precinct a certified list of the registered voters in the precinct. The list must contain the name of each voter whose registration will be effective on the date of the first election held in the county in the voting year.

(b) On request of the authority responsible for procuring election supplies for an election authorized by law to be held in the county during the voting year for which the lists are prepared, the registrar shall furnish to the authority a list for each county election precinct wholly in the territory covered by the election. On request of the authority for an election in which a county election precinct is partly in the political subdivision or partly in a territorial unit of the political subdivision from which a member of the subdivision's governing body is elected by only the voters residing in that unit, the registrar shall furnish for each partly included county election precinct a list that contains only the names of voters who reside in the political subdivision or territorial unit, as applicable. The request for restricted lists must be accompanied by a description or map of the applicable boundary of the political subdivision or territorial unit that is in sufficient detail to enable the registrar to prepare the requested lists. The request must be delivered early enough to afford the registrar reasonable time to prepare timely lists.

(c) Except as otherwise provided by this code, the list shall be used throughout the voting year.

(d) An additional copy of each list shall be furnished for use in early voting.

(e) In this code, "original list of registered voters" means a list prepared under this section.