Tennessee Code Title 57. Intoxicating Liquors § 57-3-607

(a) No holder of a nonresident seller's permit may solicit, accept, or fill an order for distilled spirits or wine from a holder of any type of wholesaler's permit unless the nonresident seller is the primary American source of supply for the brand of distilled spirits or wine that is ordered.

(b) In this section, “primary American source of supply” means the distiller, the producer, the owner of the commodity at the time it becomes a marketable product, the bottler, or the exclusive agent of any of those. To be the “primary American source of supply” the nonresident seller must be the first source, that is, the manufacturer or the source closest to the manufacturer, in the channel of commerce from whom the product can be secured by American wholesalers.