An insurer transacting municipal bond insurance as defined in Section 205.30 insurer may, for the purposes of Section 205.50, treat the amount of a clean, irrevocable letter of credit or other assets which would qualify under Section 173.1(2) of the Illinois Insurance Code (Ill. Rev. Stat. 1985, ch.73, par. 171.1(2) ) deposited with it or held in trust to secure payment of the insured principal and interest, as a reduction in the amount of exposure insured.
Ill. Admin. Code tit. 50, § 205.80