Section 9 of Pub. L. 95–515 provided that:

“(a) The provisions of this Act [this chapter] shall take effect on the date of enactment of this Act [Oct. 25, 1978], and, except as provided in subsection (b) of this section, shall apply to any interstate off-track wager accepted on or after such date of enactment.

“(b)(1) The provisions of this Act [this chapter] shall not apply to any interstate off-track wager which is accepted pursuant to a contract existing on May 1, 1978.

“(2) The provisions of this Act shall not apply to any form of legal non-parimutuel off-track betting existing in a State on May 1, 1978.

“(3) The provisions of subsection (b) of section 5 of this Act [section 3004 (b) of this title] shall not apply to any parimutuel off-track betting system existing on May 1, 1978, in a State which does not conduct parimutuel horseracing on the date of enactment of this Act [Oct. 25, 1978].”

Section 1 of Pub. L. 95–515 provided that: “This Act [enacting this chapter] may be cited as the ‘Interstate Horseracing Act of 1978’.”