(1) A collective agreement shall be prepared in writing, and both of the parties shall affix their signatures or their seals thereto. <Amended on Dec. 30, 2006>
(2) The parties to a collective agreement shall make a report of the collective agreement to the administrative agencies within 15 days from the date of its conclusion. <Amended on Feb. 20, 1998>
(3) When a collective agreement has any unlawful contents, the administrative agencies may, with the resolution of the Labor Relations Commission, order to correct them. <Amended on Feb. 20, 1998>