(1) There shall be a chairman in a special arbitration committee.
(2) The chairman of the special arbitration committee shall be elected from among the members of the special arbitration committee who are members representing public interests of the Labor Relations Commission, and when the committee is composed of those persons alone other than the members of the Labor Relations Commission, the chairman of the special arbitration committee shall be elected from among such noncommission persons; provided, where only one member of the special arbitration committee is a member representing public interests of the Labor Relations Commission, the person shall be the chairman.