Caesars Entertainment is introducing sports-betting at four of its casinos in the United States this summer, but anyone laying odds on that in Michigan will have to wait for that payoff.

Although Caesars Windsor has offered parlays for years on the other side of the Detroit River, Detroit’s casinos said they are waiting on the state government to clarify regulations for sports-betting after the U.S. Supreme Court ruled in May that the federal government’s ban on sports gambling in most states was unconstitutional.

Caesars Entertainment said Monday it would start taking sports bets this week at two casinos in Atlantic City, and by mid-August at two casinos in Mississippi.

Greektown Casino Hotel, owned by Dan Gilbert’s Jack Entertainment, supports sports-betting at “brick and mortar facilities” with proper regulation, Jack Entertainment CEO Matt Cullen said in a statement. Cullen said the company has received “significant guest interest in sport betting being available at our facilities.”