There is created a nonprofit unincorporated legal entity to be known as the Colorado insurance guaranty association. All member insurers shall be and remain members of the association as a condition of their authority to transact insurance business in this state. The association shall perform its functions under a plan of operation established and approved under section 10-4-509 and shall exercise its powers through a board of directors established under section 10-4-507. For purposes of administration and assessment, the association shall be divided into three separate accounts: Workers' compensation insurance account; automobile insurance account; and the account for all other insurance to which this part 5 applies.