A provision in the tax plan Republicans are championing in Congress has a peculiar benefit that would help out the massively wealthy in America: A tax exemption for owners of private jets.

The cut out is just one of many small peculiarities in the tax plan, which includes provisions that would give craft beer producers tax breaks, and some that change how people can buy and sell stocks.

The federal government currently imposes an excise tax on the use of private planes for every flight, but the new Republican legislation would make costs for maintenance and other support activities exempt from the excise tax.

“Applicable services include support activities related to the aircraft itself, such as its storage, maintenance, and fueling, and those related to its operation, such as the hiring and training of pilots and crew, as well as administrative services such as scheduling, flight planning, weather forecasting, obtaining insurance, and establishing and complying with safety standards,” the description of the provision from the Joint Committee on Taxation reads.

The provision would not affect costs directly incurred by flying. The new provision would see $50 million in lost revenue over the next 10 years.

The House of Representatives — which holds a commanding majority of that legislative body — has already passed a version of the tax bill, though it is unclear if it has a plausible path forward in the Senate. Debates in that chamber have already broken out into angry shouting matches between Senate Democrats and Senate Republicans.