(a) a corporation at least 90% of whose gross revenue from all sources for the year is derived from a principal business that is, throughout the year, one of the following:i. the renting or leasing of leasing property or property that would be leasing property but for sections 130R97 to 130R99,
ii. the renting or leasing of property referred to in subparagraph i combined with the selling and servicing of similar property, or
iii. the manufacturing of property described in any of Classes 34, 43.1, 43.2, 47 and 48 in Schedule B that it sells or leases; or
(b) a partnership each member of which isi. a corporation described in subparagraph a or in paragraph a of section 130R52, or
ii. another partnership described in this subparagraph.