Ala. Code § 9-20-4: Exemption for Possession of Nonindigenous Aquatic Plants.

Any person who possesses, through natural dispersion, an aquatic plant which is prohibited from being introduced or placed in a public water of the state pursuant to Section 9-20-3, and the possession poses neither danger or intent to further disperse the aquatic plant by means of transportation or other action, shall not be guilty of a violation of this chapter.