22 Pa. Code § 121.50
The provisions of this §121.50 amended under section 4 of the act of August 7, 1963 (P. L. 549, No. 290) (24 P. S. § 5104); section 1 of the act of January 25, 1966 (P. L. 1546, No. 541) (24 P. S. § 5151); the act of July 18, 1974 (P. L. 483, No. 174) (24 P. S. §§ 5181-5189); the act of July 1, 1988 (P. L. 1259, No. 155) (24 P. S. §§ 5191-5197); and the act of June 26, 1992 (P. L. 322, No. 64) (24 P. S. §§ 5198.1-5198.7).
This section cited in 22 Pa. Code § 121.151 (relating to application of existing Agency regulations).