Every association shall have power to invest in or otherwise acquire loans and interests in loans, secured or unsecured, of any type or amount and for any purpose, subject only to the requirement that as an annual average based on monthly computations, an amount equal to at least fifty percent of the gross assets other than liquid assets of the association and any of its service corporations and subsidiaries (to the extent of the association’s interest in the service corporations or subsidiaries) must be invested in one or more of the following:

(a) real estate loans or interests therein on home property or primarily residential property;

(b) mortgage related securities issued in connection with mortgage loans on home property or primarily residential property, including but not limited to Federal Home Loan Mortgage Corporation participating certificates, Federal National Mortgage Association mortgage backed securities, and Government National Mortgage Association securities;

(c) collateralized mortgage obligations issued in connection with mortgage loans on home property or primarily residential property. Any qualifying real estate loan held by a service corporation or subsidiary, and in the event the service corporation or subsidiary is not wholly owned by the association, the percentage of the outstanding principal of the qualifying loan that is equal to the association’s percentage ownership in the service corporations or subsidiaries holding the qualifying loan, will be included in the association’s qualifying real estate loans for purposes of the fifty percent test.