27 C.F.R. § 11.37
Change in product
A trade buyer's inventory of a product which has been changed in formula, proof, label or container (subject to § 11.46) may be exchanged for equal quantities of the new version of that product.
A trade buyer's inventory of a product which has been changed in formula, proof, label or container (subject to § 11.46) may be exchanged for equal quantities of the new version of that product.