Basic undertaking rule.
(ii) Basic undertaking rule. The basic undertaking rule identifies the business and rental operations that constitute an undertaking by reference to their location and ownership. Under this rule, business and rental operations that are conducted at the same location and are owned by the same person are generally treated as part of the same undertaking. Conversely, business and rental operations generally constitute separate undertakings to the extent that they are conducted at different locations or are not owned by the same person. (See paragraph (c)(2)(i) of this section.)