For the purpose of creating the employers' excess liability fund, each employer who elects to subscribe to the fund shall pay premiums based upon and being a percentage of the payroll of the employer determined by the board of managers. It is the duty of the board of managers to fix and maintain the lowest possible rates or premiums consistent with the maintenance of a solvent fund. The premium rates shall be adjusted annually or more often as may, in the opinion of the board of managers, be necessary.
The board of managers shall initially classify subscribers into groups or classes according to the nature of the unusual hazards incident to the business of the subscribers as contemplated by section four, article two of this chapter and assign premium rates to the subscribers. The fixing, maintaining and adjusting of premium rates and the initial classification of subscribers into groups or classes pursuant to this section are findings or determinations of fact and not a legislative rule. In addition, the board of managers shall by rule prescribe procedures for subscription, payroll reporting, premium payment, termination of subscription, reinstatement, reclassification of groups, classes or subscribers, the increase or decrease of premiums based upon incidence of liability and amounts awarded, and other matters pertinent to the subscribers' continuing participation in the employers' excess liability fund.