(1) A trade union shall make a report of modifications of contents to the administrative agencies within 30 days from the date when a change occurs in any of the matters falling under the following subparagraphs from among the matters reported with respect to establishment pursuant to Article 10(1): <Amended on Feb. 20, 1998; Mar. 28, 2001>
1. Name;
2. The location of the principal office;
3. The name of the representative;
4. Title of an associated organization to which it belongs.
(2) A trade union shall notify the administrative agencies of the matters falling under the following subparagraphs by January 31st of each year; provided, this shall not apply to the matters of modified report in the preceding year under paragraph (1): <Amended on Feb. 20, 1998; Mar. 28, 2001>
1. In case there was any modification in bylaws in the previous year, modified contents of bylaws;
2. In case an executive officer was replaced in the previous year, the name of the replaced executive officer;
3. The number of members (in case of a trade union in the form of an associated organization, the number of members in each constituent organization) as of December 31 of the previous year.