49 C.F.R. § 23.47
(d) This base does not include any portion of a firm's estimated gross receipts that will not be generated from a concession.
Example to paragraph (d):A firm operates a restaurant in the airport terminal which serves the traveling public and under the same lease agreement, provides in-flight catering service to air carriers. The projected gross receipts from the restaurant are included in the overall goal calculation, while the gross receipts to be earned by the in-flight catering services are not.