(a) For the purpose of providing the funds necessary to carry out the powers and duties of the association, the board of directors shall assess the member insurers, separately for each account, at such time and for such amounts as the board finds necessary. Assessments shall be due not less than 30 days after prior written notice to the member insurers and shall accrue interest at 10 percent per annum on and after the due date.
(b) There shall be two classes of assessments, as follows:
(1) Class A assessments shall be authorized and called for the purpose of meeting administrative and legal costs and other expenses. Class A assessments may be authorized and called whether or not related to a particular impaired or insolvent insurer.