The provisions of Article 2, paragraph (1), item (iv) of the New Income Tax Act apply to the income specified in Article 7, paragraph (1), items (i) through (iii) of the New Income Tax Act on or after the date on which this Act comes into effect (hereinafter referred to as "the effective date"), and the provisions then in force continue to govern the income specified in Article 7, paragraph (1), items (i) through (iii) of the Income Tax Act prior to the amendment by the provisions of Article 1 (hereinafter referred to as the "Former Income Tax Act" up to Article 22 of the Supplementary Provisions) before the effective date.