(a) General. Wine premises, or parts thereof, may be operated alternately by proprietors who have each filed and received approval of the necessary applications and bonds and have qualified under the provisions of this part. Where operations by alternating proprietors are limited to parts of the wine premises, the application will describe areas, buildings, floors, or rooms which will be alternated and will be accompanied by a diagram delineating the parts of the wine premises to be alternated. A separate diagram will be submitted to depict each arrangement under which the wine premises will be operated. Once the qualifying documents have been approved, and operations initiated, the wine premises, or parts thereof, may be alternated. Any transfer of wine, spirits, or other accountable materials from one proprietor to the other proprietor will be indicated in the records and reports of each proprietor. Operation of a bonded winery engaged in the production of wine by an alternate proprietor will be at least one calendar day in length.

(b) Alternation. All operations in any area, building, floor, or room to be alternated will be completely finished and all wine, spirits, and other accountable materials will be removed from the alternated wine premises or transferred to the incoming proprietor. However, wine, spirits, and other accountable materials may be retained in locked tanks at wine premises to be alternated and remain in the custody of the outgoing proprietor.

(c) Bonds. The outgoing proprietor who has filed bond as required under § 24.146 and intends to resume operation of the alternated areas, buildings, floors, or rooms following suspension of operations by an alternating proprietor shall execute a consent of surety to continue in effect all bonds. Where wine, spirits, or other accountable materials subject to tax under 26 U.S.C. chapter 51 are to be retained in tanks on the wine premises to be alternated, an outgoing proprietor who has filed bond as required under § 24.146 shall also execute a consent of surety to continue the liability of all bonds for the tax on the materials, notwithstanding the change in proprietorship.

(d) Records. Each proprietor shall maintain separate records and submit a separate TTB F 5120.17, Report of Bonded Wine Premises Operations. All transfers of wine, spirits, and other accountable materials will be reflected in the records of each proprietor. Each proprietor shall maintain a record showing the name and registry number of the incoming or outgoing proprietor, the effective date and hour of alternation, and the quantity in gallons and the percent alcohol by volume or proof of any wine, spirits, or other accountable materials transferred or received.