An employer or supervisory employees who represent the employer in exercising the managerial authority shall not have the following practices:
1. Refusing to hire, dismiss, demote, reduce the wage of, or render other unfair treatment to an employee who organizes or joins a labor union, participates in activities held by a labor union, or assumes the office of a labor union,
2. Requiring an employee or job applicant not to join a labor union or assume the office of a labor union as a condition of hiring preceding paragraph,
3. Refusing to hire, dismiss, demote, reduce the wage of, or render other unfair treatment to an employee who requests collective bargaining or participates in related activities concerning collective bargaining,
4. Dismiss, demote, reduce the wage of, or render other unfair treatment to an employee who participates in or supports industrial action, and
5. Improperly influence, impede or restrict the establishment, organization or activities of labor union.
Any dismissal, demotion, reduction of wage made by the employer or supervisory employees who represent the employer in exercising the managerial authority as prescribed in the preceding paragraph shall be null and void.

In case that it is necessary for the directors or supervisors of a labor union to handle union affairs during their working hours, the labor union may reach an agreement with their employer to provide them with a certain number of hours as official leave.
In case that a corporate union and the employer do not reach such an agreement as prescribed in the preceding paragraph, its chairperson of the board of directors may be entitled to have an official leave for half a day or a whole day, and other directors or supervisors may have an official leave for up to fifty hours per month to handle union affairs.
In case that a director or supervisor of a corporate union assumes the chairperson of board of directors of a national confederated labor union and the corporate union does not reach such an agreement as prescribed in Paragraph 1 to the article, the director or supervisor may have an official leave for half a day or a whole day to handle union affairs.