22 Pa. Code § 121.59
The provisons of this §121.59 issued under the act of August 7, 1963 (P. L. 549, No. 290) (24 P. S. § 5104); the act of January 25, 1966 (P. L. 1546, No. 541) (24 P. S. § 5151); the act of October 11, 1972 (P. L. 909, No. 216) (24 P. S. § 5171); and the act of October 11, 1972 (P. L. 899, No. 213) (24 P. S. § 5161).