1. The defendant's appeal is dismissed.

2. The costs of appeal shall be borne by the Defendant, including the costs of supplementary participation.

1. Basic facts

A. 1) D Housing Redevelopment Association (hereinafter “D Housing Association”)

A) A housing redevelopment association established to carry out a housing development project by making the land of Jung-gu Seoul Special Metropolitan City E as a rearrangement project zone, which is a lot of land on the same land around September 2005 (hereinafter referred to as “shot Construction”).

B) Between the 1,534 households, apartment and underground 4th floor, and C commercial building consisting of 659 stores of the size of 2nd floor above ground (hereinafter “instant commercial building”).

(2) On November 5, 2007, the D Housing Association, which had been a project operator, entered into a construction contract for the instant commercial buildings and apartment houses on April 29, 2008, entered into an electric use contract for the instant commercial buildings with the Defendant, who was a electricity supplier, on November 5, 2007 (hereinafter “instant electric use contract”). At that time, the Defendant supplied electricity in accordance with the instant electric use contract.

3) Article 9(1) of the sales contract for the instant commercial building also belongs to the management body on April 15, 2008, where the management body is formed between D Housing Association and the management body (hereinafter “instant management contract”) and the D Housing Association were selected as a management body, and the D Housing Association was established and managed on June 13, 2008.