It is the declared policy of this state that there should not be discrimination against workers who are injured in the course and scope of their employment.
(4) Any insurer that advises, directs, or threatens an insured employer under penalty of cancellation or a raise in premium or for any other reason, to discharge or in any manner discriminate against an employee because the employee testified or made known his or her intention to testify in another employee's case before the appeals board, is guilty of a misdemeanor.
Proceedings for increased compensation as provided in paragraph (1), or for reinstatement and reimbursement for lost wages and work benefits, are to be instituted by filing an appropriate petition with the appeals board, but these proceedings may not be commenced more than one year from the discriminatory act or date of termination of the employee. The appeals board is vested with full power, authority, and jurisdiction to try and determine finally all matters specified in this section subject only to judicial review, except that the appeals board shall have no jurisdiction to try and determine a misdemeanor charge. The appeals board may refer and any worker may complain of suspected violations of the criminal misdemeanor provisions of this section to the Division of Labor Standards Enforcement, or directly to the office of the public prosecutor.