In an action brought by Massachusetts against a federally recognized Indian tribe that seeks to have gaming pursuant to the Indian Gaming Regulatory Act (IGRA), 25 U.S.C. sections 2701-2721, on its trust lands, alleging that any gaming on the Settlement Lands should be subject to state, rather than federal, laws and regulations, the district court's judgment in favor of the government is reversed where: 1) the Tribe has exercised more than sufficient governmental power to satisfy the requirements of IGRA; and 2) the Wampanoag Tribal Council of Gay Head, Inc., Indian Claims Settlement Act of 1987, Pub. L. No. 100-95, 25 U.S.C. sections 1771-1771i, has been impliedly repealed by IGRA in relevant part.