All member insurers shall remain members of the association as a condition of their authority to transact insurance in this state. The association may take any appropriate form of legal entity available under the laws of this state and approved by the superintendent. For purposes of administration and assessment, the association shall be divided into three (3) separate accounts:
A. the workmen's compensation insurance account;
B. the automobile insurance account; and
C. the account for all other insurance to which this article applies.