27 United States Code, Chapter 8, Subchapter I, Section 205
(c) Commercial bribery
[It shall be unlawful ...] To induce through any of the following means, any trade buyer engaged in the sale of distilled spirits, wine, or malt beverages, to purchase any such products from such person to the exclusion in whole or in part of distilled spirits, wine, or malt beverages sold or offered for sale by other persons in interstate or foreign commerce, if such inducement is made in the course of interstate or foreign commerce, or if such person engages in the practice of using such means, or any of them, to such an extent as substantially to restrain or prevent transactions in interstate or foreign commerce in any such products, or if the direct effect of such inducement is to prevent, deter, hinder, or restrict other persons from selling or offering for sale any such products to such trade buyer in interstate or foreign commerce: (1) By commercial bribery; or (2) by offering or giving any bonus, premium, or compensation to any officer, or employee, or representative of the trade buyer.
Source: U.S. Code Online via GPO Access