(a) Section 3702 shall not apply to—
(1)
a lottery, sweepstakes, or other betting, gambling, or wagering scheme in operation in a State or other governmental entity, to the extent that the scheme was conducted by that State or other governmental entity at any time during the period beginning January 1, 1976, and ending August 31, 1990;
(2) a lottery, sweepstakes, or other betting, gambling, or wagering scheme in operation in a State or other governmental entity where both—
(B)
a scheme described in section 3702 (other than one based on parimutuel animal racing or jai-alai games) actually was conducted in that State or other governmental entity at any time during the period beginning September 1, 1989, and ending October 2, 1991, pursuant to the law of that State or other governmental entity;
(3) a betting, gambling, or wagering scheme, other than a lottery described in paragraph (1), conducted exclusively in casinos located in a municipality, but only to the extent that—
(b)
Except as provided in subsection (a), section 3702 shall apply on lands described in section 4(4) of the Indian Gaming Regulatory Act (25 U.S.C. 2703(4)).