Opponents of Houston's recently approved gay-inclusive non-discrimination ordinance on Thursday submitted 50,000 signatures aimed at putting the law on the ballot in November.

The Houston Equal Rights Ordinance (HERO) prohibits discrimination in the workplace, housing and public accommodations on the basis of several factors, including sexual orientation and gender identity.

Only 17,269 signatures from registered city of Houston voters are needed to get an issue on the ballot. Opponents said they have already validated nearly twice that number, about 30,000.

“It has been shown and demonstrated that the people of the city do not want this ordinance,” said Pastor Max Miller of the Baptist Ministers Association of Houston and Vicinity. “We simply say: Allow people to vote on this ordinance.”

Mayor Annise Parker, who championed for passage of the ordinance, vowed to fight the effort to repeal it.

“This was not a narrowly focused, special-interest ordinance,” said Parker, who is openly gay. “This is something that the business and civic community of Houston was firmly behind and we fully expect if there is a campaign that it will be a spirited campaign, but we'll have the same outcome in November as we had around the council table.”

Prior to passage in May, Houston was the largest U.S. city without such a law.