42 U.S.C. § 12211: Definitions

(a) Homosexuality and bisexualityFor purposes of the definition of “disability” in section 12102(2) of this title, homosexuality and bisexuality are not impairments and as such are not disabilities under this chapter. (b) Certain conditionsUnder this chapter, the term “disability” shall not include—(1) transvestism, transsexualism, pedophilia, exhibitionism, voyeurism, gender identity disorders not resulting from physical impairments, or other sexual behavior disorders; (2) compulsive gambling, kleptomania, or pyromania; or (3) psychoactive substance use disorders resulting from current illegal use of drugs.