TALLAHASSEE (AP) – The Florida Supreme Court on Wednesday struck down a law that let voters revoke their signatures from petition drives to put constitutional amendments on statewide ballots.

In Florida, the signatures have four-year shelf lives, giving voters time to reconsider their support for ballot proposals.

The 4-2 ruling was a victory for Florida Hometown Democracy, which challenged the law. The group is sponsoring a ballot proposal that would require voter approval of changes to local comprehensive plans.

“I’m so relieved,” said Palm Beach lawyer Lesley Blackner, co-founder of Hometown Democracy. “It’s really been a saga to qualify this initiative for the ballot. … Every year the Legislature has tried to destroy the initiative process.”

Business and development interests that oppose to Hometown Democracy sought the signature revocation law. They say Hometown Democracy’s proposal would hamper growth and depress the state’s already sagging economy.

After the law was passed, Associated Industries of Florida backed an organization that helped get about 13,000 Hometown Democracy signers to take back their signatures.

“We think that Floridians should have the ability to change their mind when they are not told the truth to begin with,” said Associated Industries President and CEO Barney Bishop. He said petition collectors made unsubstantiated claims of Hometown Democracy’s benefits.

Bishop said his organization may ask the Legislature for a constitutional amendment permitting signature revocations and overriding the Supreme Court ruling. He also said opponents may try to use the courts to stop the measure.

“Tell ’em to be prepared,” Bishop said. “What’s good for the goose is good for the gander. This ain’t over.”

The justices did not immediately explain their ruling, writing that they’d issue a full opinion at a later date. The high court’s two most reliable conservatives, Justices Charles Canady and Ricky Polston, dissented. The court’s newest member, Justice James Perry, did not participate.

Hometown Democracy sought an expedited decision to avoid losing signatures if the case wasn’t decided soon. Signatures have a shelf life of four years and that means some of the first ones, including Blackner’s, will begin expiring if the amendment isn’t certified for the 2010 ballot by Monday.