Labor Standards Act Article 84-2

The seniority of a worker is calculated from the first day of his/her employment. The standards of severance and retirement benefit for the seniority accumulated before the application of the Act shall be calculated in accordance with the applicable Acts and administrative regulations effective during that time. In cases there were no applicable Acts and administrative regulations, these standards shall be calculated in accordance with the rules promulgated by the respective business entities or the agreements reached by workers and employers themselves. After the application of the Act, the standards of severance pays and retirement benefits for the seniority accumulated shall be calculated in accordance with Articles 17 and 55 of the Act.