Ill. Admin. Code tit. 50, § 205.60
b) In addition to the contingency reserve, a municipal bond insurer shall compute and maintain reserves for losses and loss adjustment expenses for claims reported and unpaid determined by use of the case basis method or, when the requirements of Section 378 of the Insurance Code will not be met by the case basis method, such other methods as the Director may prescribe or approve which produces the reserves required by Section 378 of the Insurance Code. (Ill. Rev. Stat. 1985, ch. 73, par. 990).
c) Treatment of Contingency Reserve on Financial Statements