30 Tex. Admin. Code § 20.17
If the commission finds that an imminent peril or extraordinary circumstance may threaten the public health, safety, or welfare or the integrity of the commission's regulatory programs, and requires the adoption of a rule on less than 30 day's notice, it may adopt an emergency rule without prior notice and hearing or with any abbreviated notice and hearing that it finds practicable under the circumstances. The commission shall make a written finding which shall be filed with the secretary of state setting forth its reasons for such determination. The emergency rule shall be effective immediately upon filing with the secretary of state and will continue in effect for a period of up to 120 days. The emergency rule may be renewed once before expiration for a period of 60 days.
30 Tex. Admin. Code § 20.17