22 Pa. Code § 121.53
The provisions of this §121.53 amended under the act of August 7, 1963 (P. L. 549, No. 290) (24 P. S. § 5104); sections 1 and 2 of the act of January 25, 1966 (P. L. 1546, No. 541) (24 P. S. §§ 5151 and 5152); the act of October 29, 1969 (P. L. 283, No. 116); the act of October 11, 1972 (P. L. 899, No. 213) (24 P. S. § 5161); the act of October 11, 1972 (P. L. 909, No. 216) (24 P. S. § 5171); and the act of October 18, 1972 (No. 233).
This section cited in 22 Pa. Code § 121.151 (relating to application of existing Agency regulations).