33 USC 2403 - Prohibition on application of organotin antifouling paints on certain vessels

(a) Prohibition 
Subject to section 12 (d), and except as provided in subsection (b) of this section, no person in any State may apply to a vessel that is less than 25 meters in length an antifouling paint containing organotin.
(b) Exceptions 
Subsection (a) of this section shall not prohibit the application of a qualified antifouling paint containing organotin on
(1) the aluminum hull of a vessel that is less than 25 meters in length; or
(2) the outboard motor or lower drive unit of a vessel that is less than 25 meters in length.