(a) The county election returns for an election for the office of governor or lieutenant governor shall be canvassed by the legislature and the official result declared by the speaker of the house of representatives in accordance with Article IV, Section 3, of the Texas Constitution.
(b) If a county's election returns are incomplete or missing, the legislature may substitute the secretary of state's tabulation for that county or may obtain the necessary information from the county. On request of the legislature, the secretary of state or the county shall promptly transmit the information to the legislature by the most expeditious means available.
(c) On completion of the canvass, the speaker of the house of representatives shall deliver the county returns to the secretary of state, who shall retain them for the period for preserving the precinct election records.