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 judgment of the court of first instance concerning this case is as stated in the reasoning of the judgment of the court of first instance, in addition to the parts which are used or added as follows, and thus, it shall be quoted in accordance with Article 8(2) of the Administrative Litigation Act and the main sentence of Article 420 of the Civil Procedure Act.

[Supplementary or additional parts] On the two pages of the judgment of the court of first instance, approximately KRW 224 persons "a about 240 persons" shall be deemed "a about 224 persons."

In the judgment of the court of first instance, approximately KRW 1,657, "a person with approximately KRW 1,00" shall be deemed "a person with approximately 1,657 persons".

On the fourth and nine pages of the judgment of the first instance court (based on recognition), "Evidence A No. 26, 27, 29" is added.

Part 5 of the judgment of the court of first instance, the intervenor A's branch, which is a trade union to join in arms contract positions, shall be called "the representative bargaining trade union of this case and the intervenor A's branch."

On February 7, 2018, the representative bargaining trade union of this case revised the trade union regulations to expand the scope of joining to the assistant instructors, academic affairs management personnel, and inorganic contract workers belonging to the Plaintiff. On May 9, 2018, a ground provision was newly established to establish a branch of the union, which is a subordinate organization under the union. Accordingly, on July 11, 2018, the representative bargaining trade union of this case established the university working-level branch of the university of this case (title at the time was "the branch of its own staff," but the name was changed to "university working-level branch of the university" on August 1, 2018).

E) On February 19, 2019, the representative bargaining trade union of this case (254 members from among 1,657 members at the time of the date of the request for bargaining) requested each Plaintiff to conduct collective bargaining to conclude a collective agreement on the bargaining unit for its own employees on February 26, 2019, and the Intervenor A’s branch (224 members at the time of the date of the request for bargaining).

Upon the request of the representative bargaining trade union of this case, the Plaintiff is a self-employee of the instant representative bargaining trade union for five days from March 20, 2019.