The policy of the state being primarily to promote peace in labor relations, these rules and all other rules adopted by the agency shall be liberally construed to effectuate the purposes and provisions of the statutes administered by the agency, and nothing in any rule shall be construed to prevent the commission and its authorized agents from using their best efforts to adjust any labor dispute. The commission and its authorized agents may waive any requirement of the rules unless a party shows that it would be prejudiced by such a waiver.