28 Pa. Code § 1171a.30 – Standards for testing.

(a) An approved laboratory shall follow the methodologies, ranges and parameters that are consistent with the scope of the certificate of accreditation issued to the laboratory and in accordance with this chapter.
(b) Testing methods used by an approved laboratory shall meet or exceed the minimum standards under the American Herbal Pharmacopeia’s ‘‘Cannabis Inflorescence Standards of Identity, Analysis and Quality Control,’’ 2014 Revision Edition.

This section cited in 28 Pa. Code § 1151a.27 (relating to requirements for growing and processing medical marijuana).