Cal. Bus. & Prof. Code § 23368

A rectifier’s license authorizes the person to whom issued to cut, blend, rectify, mix, flavor, and color distilled spirits and wine upon which the excise tax imposed by Part 14 of Division 2 of the Revenue and Taxation Code has been paid, and, whether so cut, blended, mixed, flavored, or colored by him or any other person, to package, label, export, and sell the products to persons holding licenses authorizing the sale of distilled spirits.