Starting with New Hampshire in 1963, numerous state governments began to operate lotteries and other gambling in order to raise money for government services, often promoting the programs by promising to earmark revenues to fund education, for instance. In 1987 the Supreme Court of the United States ruled that federally recognized tribes could operate gaming facilities on reservations, as this was sovereign territory, and be free from state regulation. As tribes began to develop gaming, starting with bingo, in 1988 the U.S. Congress enacted the Indian Gaming Regulatory Act (IGRA). It set the broad terms for Native American tribes to operate casinos, requiring that they do so only in states that had already authorized private gaming. Since then development of casino gaming has been one of the chief sources for many tribes of new revenues.