This Act does not apply to national public officers or local public officers; provided, however, that this does not apply to disputes concerning the working conditions of employees prescribed in Article 2, item (ii) of the Act on Labor Relations of Agency Engaged in Administrative Execution, employees of municipal utility prescribed in Article 15, paragraph (1) of the Local Public Enterprise Act (Act No. 292 of 1952), employees prescribed in Article 47 of the Local Independent Administrative Agency Act (Act No. 118 of 2003), and local public officers who are in regular service positions hired to perform simple tasks as prescribed in Article 57 of the Local Public Service Act (Act No. 261 of 1950), other than employees prescribed in Article 3, item (iv) of the Local Public Enterprise Labor Relationships Act (Act No. 289 of 1952).