7 U.S.C. § 2225a

On and after October 28, 1991, the expenditure of any appropriation for the Department of Agriculture for any consulting service through procurement contract, pursuant to 5 U.S.C. 3109, shall be limited to those contracts where such expenditures are a matter of public record and available for public inspection, except where otherwise provided under existing law, or under existing Executive order issued pursuant to existing law.