For purposes of measuring the asset coverage requirements of
section 80a–18(a) of this title, a senior security created by the guarantee by a business development company of indebtedness issued by another company shall be the amount of the maximum potential liability less the fair market value of the net unencumbered assets (plus the indebtedness which has been guaranteed) available in the borrowing company whose debts have been guaranteed, except that a guarantee issued by a business development company of indebtedness issued by a company which is a wholly-owned subsidiary of the business development company and is licensed as a small business investment company under the Small Business Investment Act of 1958 [
15 U.S.C. 661 et seq.] shall not be deemed to be a senior security of such business development company for purposes of
section 80a–18(a) of this title if the amount of the indebtedness at the time of its issuance by the borrowing company is itself taken fully into account as a liability by such business development company, as if it were issued by such business development company, in determining whether such business development company, at that time, satisfies the asset coverage requirements of
section 80a–18(a) of this title.