12 Pa. Code § 145.45
A local enforcement agency may propose to the Department that certain provisions of the codes and standards adopted in §§ 145.41, 145.42 and 145.44 (relating to adoption of standards; alternate standards; and procedure for adoption of amendments) be changed as applied to its locality because of special local environmental conditions such as snow loads, wind loads, seismic conditions, temperature, humidity or soil conditions. The local enforcement agency's proposal should indicate the nature and extent of the special environmental conditions, suggest substitute code provisions to be applicable to its locality, and define the geographic boundaries to which the substitute provisions would apply. The Department will review the proposal on the basis of the information that it deems necessary to make an informed decision, and shall determine whether amendments to the applicable codes would serve the health, safety and welfare of the citizens of this Commonwealth in consideration of other applicable Commonwealth requirements and promote the purposes of the act and this chapter. If the Department favors adoption of amendments, the provisions of § 145.97 (relating to amendments to this chapter) are applicable.
12 Pa. Code § 145.45