Authorizes retrospective rating plan employers and groups who administer their plans with an approved claims administrator to assist the department of labor and industries in the processing of claims when approved by the department.

Requires an employer, when a retrospective rating plan employer or group or its representative communicates with a medical provider, to provide to the worker and send to the claim file a copy of any written communication received and a memorandum describing any oral communication.

Requires the joint legislative audit and review committee to study certain impacts on the workers' compensation system.

Expires July 1, 2016.