27 C.F.R. § 1.44
No basic permit shall be leased, sold, or otherwise voluntarily transferred, and, in the event of such lease, sale, or other voluntary transfer, such basic permit shall automatically terminate thereupon. If any basic permit is transferred by operation of law or if actual or legal control of the permittee is acquired, directly or indirectly whether by stock ownership or in any other manner, by any person, then such permit shall be automatically terminated at the expiration of 30 days thereafter: Provided, That if within such 30-day period application for a new basic permit is made by the transferee or permittee, respectively, then the outstanding basic permit shall continue in effect until such time as the application is finally acted upon.
27 C.F.R. § 1.44