The National Organization for Marriage (NOM) on Wednesday announced a four-year plan to repeal gay marriage in New York.

On Friday, New York's Republican-controlled Senate passed and Governor Andrew Cuomo signed into law a gay marriage bill, making the Empire State the most populous state yet to legalize the institution. The law takes effect on July 25.

NOM, the country's most vociferous opponent of gay marriage, had already pledged $2 million to oust the four GOP senators who voted for the legislation, and in a blog post the group unveiled its plan to reverse the law – in four years.

NOM's plan includes growing a majority in the Legislature to approve a constitutional amendment for the 2015 ballot.

Responding to the plan, the Human Rights Campaign (HRC), the nation's largest gay rights advocate, said NOM is “spinning their wheels.”

“A bipartisan supermajority of New Yorkers support marriage equality today,” the group wrote. “Four years from now – when NOM hopes to reverse marriage equality through a ballot initiative – this supermajority in the Empire State will only be stronger and more bipartisan.”

“Americans move in one direction on this issue – toward equality, not away from it. The ship has sailed.”

NOM has previously successfully campaigned against gay marriage laws in California and Maine. But in both instances putting a ballot question before the voters didn't require Legislative approval, a significant barrier in New York.