Sen. Rand Paul (R-KY) introduced legislation on Thursday calling for an audit of the Federal Reserve. The senator’s proposal comes after Federal Reserve Chairman Jerome Powell has faced scrutiny for the $2.5 billion in renovations he authorized for two federal buildings in Washington, D.C.

Paul’s bill, the Federal Reserve Transparency Act, would require a complete audit of all of the Federal Reserve’s operational activities and mandate an enhancement of its decision-making through increased congressional oversight. The Comptroller General of the United States would complete the audit and include an inspection of “the Board of Governors of the Federal Reserve System and of Federal Reserve banks,” according to the bill. The bill stipulates that the audit must be completed less than “12 months after the date of enactment” of Paul’s legislative proposal.