27 C.F.R. § 19.117
(a) If there is a death or insolvency of a partner in the business registered under this part, the surviving partner or partners may continue to operate under the notice of registration if:
(b) If the surviving partner or partners acquire the business upon settlement of the partnership, the surviving partner or partners must file as an incoming proprietor and receive an approved notice of registration of the plant in accordance with § 19.116(a).
(26 U.S.C. 5172)