Unauthorized possession of controlled drug or substance as felony

No person may knowingly possess a controlled drug or substance unless the substance was obtained directly or pursuant to a valid prescription or order from a practitioner, while acting in the course of the practitioner's professional practice or except as otherwise authorized by chapter 34-20B . A charge for unauthorized possession of controlled substance when absorbed into the human body as set forth in subdivision 22-42-1(1) shall only be charged under the provisions of §