1. The plaintiff's appeal is dismissed.

2. The costs of appeal shall be borne by the Plaintiff, including the part arising from the supplementary participation.

1. The reasoning of the court's explanation concerning this case is as stated in the reasoning of the judgment of the court of first instance, except for the part resulting from a written appeal under Paragraph (2) below, and thus, it shall be cited as it is in accordance with Article 8 (2) of the Administrative Litigation Act and the main sentence of Article 420 of the Civil Procedure

(1) In addition, the first instance court's decision rejecting the Plaintiff's claim is justifiable even if the Plaintiff's appeal did not differ significantly from the allegations in the first instance court, and all of the evidence submitted by the first instance court and this court were examined). 2. The second instance court's "statement" in the fourth instance court's decision in the second instance as "statement (including number; hereinafter the same shall apply)" in the second instance's decision.

On the 7th written judgment of the first instance court, "B Nos. 3-7" was added to "B" No. 3-7 and 16.

Part 8 of the judgment of the first instance, part 7 of the judgment of the court of first instance shall be applied to the participation union "the participant union".

The following shall be added between the first and second parts of the judgment of the first instance.

④ In regard to this, the Plaintiff Company, at the time of labor-management practice, deemed legitimate procedures for the simplification of bargaining windows between the Plaintiff Company and the G Trade Union. The Intervenor B, who was a representative of the G Trade Union for a long time, was fully aware of the legitimacy of the procedures for the simplification of bargaining windows conducted between the Plaintiff Company and the G Trade Union, asserts that the act of sending the instant text messages to the effect that the sending of the instant text messages does not fall under the legitimate scope of activities of the trade union, because he was sent the instant text messages for the purpose of revealing the existence sense of the Intervenor Trade Union

However, even if there are multiple trade unions, the individual trade union has its own right to collective bargaining and sign collective agreements based on the three labor rights guaranteed by the Constitution.