the provisions in Article 28 amending the heading preceding Article 100 of the Defined-Benefit Corporate Pension Act and that Article, the provisions in Article 29 amending Article 50 (including its heading) and Article 123, item (v) of the Defined Contribution Pension Act, and the provisions of Article 31, and the provisions of Articles 36 and 43 of the Supplementary Provisions, the provisions of Article 44 of the Supplementary Provisions (excluding the amending provisions set forth in item (i)), and the provisions of Articles 45 through 54 of the Supplementary Provisions: the date specified by Cabinet Order within a period not exceeding five years from the date of promulgation;