This Act comes into effect on April 1, 2022; provided, however, that the provisions set forth in the following items come into effect on the dates specified in those items:

With regard to the application of the provisions of Article 16 of the Income Tax Act prior to the amendment by Article 1 (hereinafter referred to as "the former Income Tax Act") to a change in the locality for paying income tax made before January 1, 2023 under the provisions of paragraph (1), (2) or (5) of that Article, the provisions then in force continue to govern.

With regard to the application of the provisions of Article 20 of the former Income Tax Act to a change in the locality for paying income tax made before January 1, 2023, the provisions then in force continue to govern.

The provisions of Article 42, paragraph (1) of the Income Tax Act as amended by Article 1 (hereinafter referred to as "the new Income Tax Act") apply to government subsidies or their equivalent prescribed in that paragraph that an individual receives 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 government subsidies or their equivalent prescribed in Article 42, paragraph (1) of the former Income Tax Act that an individual received before the effective date.

The provisions of Article 45, paragraph (3) of the new Income Tax Act apply to income tax for tax year 2023 and subsequent tax years.

①The provisions of Article 177, paragraph (1) of the new Income Tax Act apply to dividends or similar income prescribed in that paragraph that a Domestic Corporation referred to in that paragraph is to receive on or after October 1, 2023.

②The provisions of Article 177, paragraph (2) of the new Income Tax Act apply to dividends or similar income prescribed in that paragraph that a Domestic Corporation referred to in that paragraph is to receive on or after October 1, 2023.

The provisions of Article 198, paragraph (5) of the new Income Tax Act apply to salary income earners' returns for insurance premium deduction prescribed in Article 196, paragraph (3) of the Income Tax Act that are submitted on or after October 1, 2022, and the provisions then in force continue to govern such salary income earners' returns for insurance premium deduction that were submitted before that date.

The provisions of Article 212, paragraph (3) of the new Income Tax Act apply to interest or similar income, dividends or similar income, compensation for periodic deposits, finance charges, profits, margin profits, distributions of profits or monetary awards prescribed in that paragraph that are payable to a Domestic Corporation on or after October 1, 2023, and the provisions then in force continue to govern interest or similar income, dividends or similar income, compensation for periodic deposits, finance charges, profits, margin profits, distributions of profits or monetary awards prescribed in Article 212, paragraph (3) of the former Income Tax Act that were payable to a Domestic Corporation before that date.

With regard to the application of penal provisions to acts committed before this Act (or, for the provisions set forth in the items of Article 1 of the Supplementary Provisions, those provisions; hereinafter the same applies in this Article) comes into effect, and to acts committed after this Act comes into effect in the cases where the provisions then in force continue to govern pursuant to the provisions of these Supplementary Provisions and in the cases where provisions remain in force pursuant to the provisions of these Supplementary Provisions, the provisions then in force continue to govern.

Beyond what is provided for in these Supplementary Provisions, transitional measures necessary for the enforcement of this Act are specified by Cabinet Order.