Code of Alabama
Chapter 17A - Drugs and Controlled Substances Excise Tax.
Section 40-17A-6 - Exemption of Persons Registered Under Section 20-2-51 or Otherwise in Lawful Possession.

Nothing in this chapter requires persons registered under Section 20-2-51, or otherwise lawfully in possession of marihuana or a controlled substance, to pay the tax required under this chapter.