Sec. 51.130.  EFFECTIVE DATE OF RULES AND REGULATIONS.  The penalty for violation of a rule or regulation is not effective and enforceable until five days after the publication of the notice.  Five days after the publication, the published regulation shall be in effect and ignorance of it is not a defense for a prosecution for the enforcement of the penalty.
Acts 1971, 62nd Leg., p. 110, ch. 58, Sec. 1, eff. Aug. 30, 1971.