The secretary is authorized to promulgate rules and regulations governing outdoor advertising devices and such rules and regulations shall contain the criteria set forth under section 5 of this act and shall contain the permit provisions set forth under section 7 of this act. Regulations relating to outdoor advertising devices permitted under clauses (1) through (3) of section 4 shall be no more restrictive than the national standards pertaining to such outdoor advertising devices.
36 P.S. § 2718.106