By Barbara Grzincic (Reuters) – California cannot seek environmental concessions from five Native American Tribes during negotiations to renew their contracts to operate “Las Vegas style” casinos, a federal appeals court held. The 9th U.S. Circuit Court of Appeals said Thursday the state violated the Indian Gaming Regulatory Act (IGRA) by demanding nearly 30 pages’ worth of “sprawling” environmental regulations, as well as tort and family-law changes with no direct relation to gaming activities. Among other things, the state wanted the Tribes to enact “significant aspects” of the California En…