25 Pa. Code § 245.602
The standards and requirements established in this subchapter shall be applied through the use of appropriate current codes of practice developed by Nationally recognized associations such as, but not limited to, those referenced in § 245.604 (relating to referenced organizations) and through the use of manufacturer's specifications and sound engineering practices. This subchapter is not intended to supersede other State and Federal regulations or jurisdictional requirements when they are more restrictive than the requirements in this part. For certain types of tanks this subchapter may make reference to the requirements for aboveground storage tanks in Subchapter F (relating to technical standards for aboveground storage tanks and facilities).
25 Pa. Code § 245.602