(a) Section 3(r) of the Act provides, in pertinent part that ``enterprise'' as used in the Act:
(a) that it will sell, or sell only, certain goods specified by a particular manufacturer, distributor, or advertiser, or (b) that it will join with other such establishments in the same industry for the purpose of the collective purchasing, or (c) that it will have the exclusive right to sell the goods or use the brand name of a manufacturer, distributor, or advertiser within a specified area, or by reason of the fact that it occupies premises leased to it by a person who also leases premises to other retail or service establishments * * * The scope and application of this definitional language is discussed in subpart C of this part.
(b) The 1966 amendments added two clauses to the above language of the definition to make it clear that ``the activities performed by any person or persons'' will be regarded as performed for a business purpose if they are performed:
(1) In connection with the operation of a hospital, an institution primarily engaged in the care of the sick, the aged, the mentally ill or defective who reside on the premises of such institution, a school for mentally or physically handicapped or gifted children, an elementary or secondary school, or an institution of higher education (regardless of whether or not such hospital, institution, or school is public or private or operated for profit or not for profit); or
(2) In connection with the operation of a street, suburban, or interurban electric railway, or local trolley or motorbus carrier, if the rates and services of such railway or carrier are subject to regulation by a State or local agency (regardless of whether or not such railway or carrier is public or private or operated for profit or not for profit). A discussion of the scope and application of this added language is contained in part 776 of this chapter.