7 U.S. Code § 206 - Rates and charges generally; discrimination
All rates or charges made for any stockyard services furnished at a stockyard by a stockyard owner or market agency shall be just, reasonable, and nondiscriminatory, and any unjust, unreasonable, or discriminatory rate or charge is prohibited and declared to be unlawful: Provided, That rates and charges based upon percentages of the gross sales prices of livestock shall not be prohibited merely because they are based upon such percentages rather than on a per head basis.
Source(Aug. 15, 1921, ch. 64, title III, § 305,42 Stat. 164; Pub. L. 95–409, § 1(a),Oct. 2, 1978, 92 Stat. 886.)
1978—Pub. L. 95–409inserted proviso that rates and charges based upon percentages of gross sales of livestock shall not be prohibited merely because based on such percentages rather than on a per head basis.