Texas Election Code - ELEC § 65.003. Rotating Ballot Boxes No. 1 and No. 2

(a) If the counting of the ballots is to begin before voting is concluded, ballot box no. 1 and ballot box no. 2 shall be used on a rotating basis at the polling place.

(b) When either ballot box no. 1 or no. 2 containing marked ballots is delivered to the election officers counting the ballots, the other box shall be immediately made available for the deposit of marked ballots.

(c) Before the ballot box is positioned for the receipt of marked ballots, an election officer shall examine it, remove its contents, and lock the box.