(a) A Bank shall make long-term advances only for the purpose of enabling any member to purchase or fund new or existing residential housing finance assets.

(b)(1) Prior to approving an application for a long-term advance, a Bank shall determine that the principal amount of all long-term advances currently held by the member does not exceed the total book value of residential housing finance assets held by such member. The Bank shall determine the total book value of such residential housing finance assets, using the most recent Thrift Financial Report, Report of Condition and Income, financial statement or other reliable documentation made available by the member.

(2) Applications for CICA advances are exempt from the requirements of paragraph (b)(1) of this section.