It has to do with some quirks in the Indian Gaming Regulatory Act, and its interaction with state law. Card Craps is sometimes referred to as "California Craps

It has to do with some quirks in the Indian Gaming Regulatory Act, and its interaction with state law. Card Craps is sometimes referred to as "California Craps" because it was invented to sidestep restrictions on the use of dice to determine the outcome of any wager in California tribal casinos. The situation is similar in other states with Indian casinos, which is why this game has spread.