TALLAHASSEE - Backers of a proposed constitutional amendment that would restrict the expansion of gambling in Florida have submitted more than 100,000 petition signatures to the state.

The political committee “Voters In Charge” spent about $472,000 from April 1 to June 30, with almost all of the money going to petition printing, gathering and verification, according to finance reports. The committee had submitted 104,416 valid petition signatures as of Thursday and needs to submit a total of 766,200 to get on the November 2018 ballot, information on the state Division of Elections website shows.

The proposed constitutional amendment, if approved next year, would give voters the "exclusive right to decide whether to authorize casino gambling" in the state. It would require voter approval of casino-style games in the future. The Florida Supreme Court this spring signed off on the proposal's ballot wording, a key first step in the process. Disney Worldwide Services has been a key backer of the initiative, contributing $400,000 in June and $250,000 in April, finance records show.