Pennsylvania Statutes Title 35 P.S. Health and Safety § 10231.704. Laboratory

(a) General testing.--A grower/processor shall contract with one or more independent laboratories to test the medical marijuana produced by the grower/processor.  The department shall approve a laboratory under this subsection and require that the laboratory report testing results in a manner as the department shall determine, including requiring a test at harvest and a test at final processing.  The possession by a laboratory of medical marijuana shall be a lawful use.

(b) Stability testing.--A laboratory shall perform stability testing to ensure the medical marijuana product's potency and purity.  A grower/processor shall retain a sample from each medical marijuana product derived from a harvest batch and request that a sample be identified and collected by a laboratory approved under subsection (a) from each process lot to perform stability testing under the following conditions: