Section 69.51.080 - Cannabis and related products considered Schedule II substances(1) The enumeration of tetrahydrocannabinols, or a chemical derivative of tetrahydrocannabinols in RCW 69.50.204 as a Schedule I controlled substance does not apply to the use of cannabis, tetrahydrocannabinols, or a chemical derivative of tetrahydrocannabinols by certified patients pursuant to the provisions of this chapter.(2) Cannabis, tetrahydrocannabinols, or a chemical derivative of tetrahydrocannabinols shall be considered Schedule II substances as enumerated in RCW 69.50.206 only for the purposes enumerated in this chapter.