(c)Complex business organizations. In complex retail and service organizations, questions may arise as to whether certain activities are a part of a particular enterprise. In some cases one employer may operate several separate enterprises; in others, several employers may conduct their business activities in such a manner that they are part of a single enterprise. The answer, in each case, as to whether or not the "enterprise" includes certain activities will depend upon whether the particular activities are "related" to the business purpose of such enterprise and whether they are performed with its other activities through "unified operation" or "common control," or whether, on the other hand, they are performed for a separate and distinct business purpose. As the Senate Report states, related activities conducted by separate business entities will be considered a part of the same enterprise where they are joined either through unified operation or common control into a unified business system or economic unit to serve a common business purpose.
(S. Rept. 145, 87th Cong., 1st Sess., p. 41; see also H. Rept. 1366, 89th Cong., 2d Sess., p. 9.) §§ 779.205 through 779.211 discuss the terms of the definition and may aid in making these determinations.