A new $1.9 billion NFL stadium being planned for Las Vegas could get even more expensive if Republicans in Congress succeed in pushing through a ban on tax-exempt bonds for stadiums in professional sports.

The ban would apply to bonds issued after Nov. 2, according to the Republican tax reform plan unveiled Thursday in the House of Representatives. If it passes, that would affect the financing of the Las Vegas stadium, though it’s not clear how much.

“I am not sure,” said Jeremy Aguero, an analyst who works for the Las Vegas Stadium Authority, which will own and oversee the stadium. “We are evaluating the potential impact if the bonds were converted from tax-exempt municipal bonds to taxable municipal bonds.”

Aguero told USA TODAY Sports on Friday that none of the tax-exempt bonds planned for the stadium have been issued yet.