29 CFR 1620.7 - “Enterprise” coverage.
(a) The terms “enterprise” and “enterprise engaged in commerce or in the production of goods for commerce” are defined in subsections 3(r) and 3(s) of the FLSA. Under the enterprise concept, if a business is an “enterprise engaged in commerce or in the production of goods for commerce,” every employee employed in such enterprise or by such enterprise is within the coverage of the EPA unless specifically exempted in the FLSA, regardless of whether the individual employee is actually engaged in commerce or in the production of goods for commerce. The term “enterprise” is not synonymous with the terms “employer” or “establishment” although on occasion the three terms may apply to the same business entity. An enterprise may consist of a single establishment operated by one or more employers. (See definitions of “employer” and “establishment” in §§ 1620.8 and 1620.9.)
(b) In order to constitute an enterprise, the activities sought to be aggregated must be related to each other, they must be performed under a unified operation or common control, and they must be performed for a common business purpose. Activities are related when they are the same or similar, or when they are auxiliary services necessary to the operation and maintenance of the particular business. Activities constitute a unified operation when the activities are operated as a single business unit or economic entity. Activities are performed under common control when the power to direct, restrict, regulate, govern or administer the performance of the activities resides in a single person or entity or when it is shared by a group of persons or entities. Activities are performed for a common business purpose when they are directed to the same or similar business objectives. A determination whether the statutory characteristics of an enterprise are present in any particular case must be made on a case-by-case basis. See generally, subpart C of 29 CFR part 779 for a detailed discussion of the term “enterprise” under the FLSA.