42 U.S.C. § 14334
Limitations on sale of button cell mercuric-oxide batteries
No person shall sell, offer for sale, or offer for promotional purposes any button cell mercuric-oxide battery for use in the United States on or after May 13, 1996 .
( Pub. L. 104–142, title II, § 205 , May 13, 1996 , 110 Stat. 1336 .)