The public counsel:
(1) may appear or intervene, as a party or otherwise, as a matter of right before the commissioner, commissioner of insurance, division, or department on behalf of injured employees as a class in matters involving rules, agency policies, and forms affecting the workers’ compensation system that the commissioner or the commissioner of insurance adopts or approves;
(2) may intervene as a matter of right or otherwise appear in a judicial proceeding involving or arising from an action taken by an administrative agency in a proceeding in which the public counsel previously appeared under the authority granted by this chapter;
(3) may appear or intervene, as a party or otherwise, as a matter of right on behalf of injured employees as a class in any proceeding in which the public counsel determines that the interests of injured employees as a class are in need of representation, except that the public counsel may not intervene in an enforcement or parens patriae proceeding brought by the attorney general; and
(4) may appear or intervene before the commissioner, commissioner of insurance, division, or department, as a party or otherwise, on behalf of injured employees as a class in a matter involving rates, rules, agency policies, or forms affecting injured employees as a class in any proceeding in which the public counsel determines that injured employees are in need of representation.