Chicagoans might not know until October if the city will get a casino. Illinois Gov. Pat Quinn is currently looking over the gambling bill, but it’s not officially available to sign.

Senate President John Cullerton explained on Monday why he’s using a parliamentary procedure to hold the bill.

“He’s obviously expressed concerns publicly on some of the provisions in the bill. So we’re taking the time to go over the bill with the governor to make sure if there’s any changes that he wants, that he can make those through a trailer bill,” Cullerton said.

Cullerton says a trailer bill will give the governor more flexibility. In other words, it’ll make it less likely that Quinn would veto it and send it back for a time-consuming rewrite. Gambling supporters hope adjustments can be made so Quinn will sign the legislation this fall.