(a) The commissioner shall publish the schedules by filing a certified copy of the schedules with the secretary of state for publication in the Texas Register not later than the fifth working day after the date the commissioner takes action under this subchapter.
(b) Each published schedule must show changes, if any, made in the schedule since its latest publication.

(c) An action by the commissioner that establishes or modifies a schedule under this subchapter may take effect not earlier than the 21st day after the date on which the schedule or modification is published in the Texas Register unless an emergency exists that necessitates earlier action to avoid an imminent hazard to the public safety.