Commissioners on the state Board of Elections approved controversial new rules Wednesday to rein in the authority of its chief investigator.

The board, in a 3-1 vote, gave itself more power over subpoenas issued by Chief Enforcement Counsel Risa Sugarman.

While the board already has the power to approve subpoenas in specific probes, it now can ask Sugarman for specific details about cases she’s investigating.

The new rules also allow the target of a subpoena to apply to the board “to quash or modify” it.

Sugarman claimed the restrictions placed on her were a political hit.

“The board has clearly overstepped their authority. And when I ask why, the answer I see is not transparency or accountability but politics,” she said in a statement.

Gov. Andrew Cuomo, who approved the law that created the independent chief enforcement counsel’s office in 2014, said he opposed the rules to clip Sugarman’s wings.

“We don’t support their adoption and believe that today’s vote should be delayed and members should go back to the drawing board to address these concerns,” said Cuomo spokesman Tyrone Stevens.

Board members defended their action as lawful and proper and noted the enforcement officer doesn’t operate wholly independent of the board.

The only dissenting board vote was cast by Andrew Spano, the former Westchester County Executive.