[2] Whether this case’s annual salary system is included in the person who consented to (A) whether the annual salary system is included in the subject of consent (1) where a group of workers is within a single working condition system, even if only a group of workers is directly disadvantaged but it is anticipated that the revised rules of employment will be applied to other workers groups, the group of workers, including a certain group of workers, as well as a workers who are expected to be subject to the revised rules of employment, becomes the subject of consent, and where there is no employee group, other than a group of workers, to whom the revised rules of employment are applied and who are likely to be directly disadvantaged, the revised rules of employment, and where there is no employee group, other than a group of workers, to whom the revised rules of employment are applied, only the group of workers to whom the revised rules of employment would be applied, shall be the subject of consent (see Supreme Court Decision 2009Du2238, May 28, 2009).