All headwear is banned in the House under a 19th Century rule.

She hasn't even been sworn in yet, and already Ilhan Omar is helping bring change to the way business gets done in Congress.

Democrats in the U.S. House, including Rep. Nancy Pelosi and other top party leaders, are proposing to lift a 181-year-old ban on hats on the House floor, the Washington Post reports.

This is because Omar, a Minnesota state lawmaker who on Nov. 6 made history by becoming one of the first Muslim women ever elected to Congress (the other being Rashida Tlaib of Michigan), wears a hijab – which could technically violate the House's no-hats rule.

The proposed change is part of a "draft rules package" – which lays out the priorities of the party coming into power, in this case the Democrats – announced on Thursday, WCCO says.

As the station notes, the draft rules package is "traditionally the first vote of the new Congress," which will begin in January.

Democrats won control of the House on Election Day; the Senate will remain in Republican hands.

Omar will be representing Minnesota's 5th District in Congress.

The headwear proposal, along with others in the package, "effectively doubles as a rebuke of the anti-Muslim rhetoric voiced by Republican candidates in several 2018 midterm races," the Washington Post says.

The anti-hat rule in the U.S. House dates back to 1837.