27 CFR §6.151

1. (a)Exclusion, in whole or in part occurs:
   1. (1)When a practice by an industry member, whether direct, indirect, or through an affiliate, places (or has the potential to place) retailer independence at risk by means of a tie or link between the industry member and retailer or by any other means of industry member control over the retailer; and
   2. (2)Such practice results in the retailer purchasing less than it would have of a competitor's product.
2. (b)Section 6.152 lists practices that create a tie or link that places retailer independence at risk. Section 6.153 lists the criteria used for determining whether other practices can put retailer independence at risk.