This Act comes into effect on May 1, 1970; provided, however, that the provisions amending the proviso to Article 13, paragraph (1), Article 74, paragraph (2), item (vi), Article 176, paragraph (1), item (ii), and Article 227 come into effect on October 1 of that year.

Except as otherwise provided in these Supplementary Provisions, the provisions of the Income Tax Act as amended (hereinafter referred to as "the New Act") apply to income tax for 1970 and subsequent years, and the provisions then in force continue to govern income tax for 1969 and earlier years.

②The amount of income tax on taxable gross income, taxable retirement income, or taxable timber income for 1970, or the amount of tax set forth in Article 90, paragraph (1), item (i) of the New Act, is to be the amount of tax set forth in the following items according to the category of tax amount set forth in each of those items:

The provisions of Article 92, paragraph (1) (Dividend Tax Credits) of the New Act apply to income tax for 1971 and subsequent years, and the provisions then in force continue to govern income tax for 1970 and earlier years.

①With regard to a Resident's income tax for 1970, the tax prepayment calculation base prescribed in Article 104, paragraph (1) (Making Tax Prepayments) of the New Act (hereinafter referred to as the "tax prepayment calculation base") is to be, except in the case where the provisions of the following paragraph apply, the amount calculated by multiplying the amount set forth in item (i) by the rate set forth in item (ii):

②The tax prepayment calculation base for income tax for 1970 of a Resident whose taxable aggregate income and similar amount for 1969 is 80 million yen or more is to be the amount arrived at when 1,850,000 yen is deducted from the amount set forth in item (i) of the preceding paragraph for that person.

③The calculation of the tax prepayment calculation base for 1970 in the case where Article 97, paragraph (1) (Amount of Tax If There Are Household Members Subject to Aggregation) of the Former Act was applied to income tax for 1969 is specified by Cabinet Order.

④The tax prepayment calculation base for income tax for 1970 of a Nonresident is as calculated in accordance with the provisions of the preceding three paragraphs.

①With regard to the application of Article 140, paragraph (1) (Claim to Be Issued a Refund Based on Carryback of Net Loss) or Article 141, paragraph (1) (Claim by an Heir to Be Issued a Refund Based on Carryback of Net Loss) of the New Act (including as applied mutatis mutandis pursuant to Article 166 (Application Mutatis Mutandis to Nonresidents) of the New Act; the same applies in the following paragraph) in the case where there is a Net Loss in 1970, the amount of income tax that forms the basis for calculating the refund under those provisions is the amount of income tax calculated by applying Article 3, paragraph (2) (Special Provisions on Income Deductions and Calculation of Tax Amounts for Income Tax for 1969) of the Supplementary Provisions of the Act Partially Amending the Income Tax Act (Act No. 14 of 1969) (including Article 90, paragraph (2) (Averaging Taxation on Fluctuating Income and Ad Hoc Income) of the Income Tax Act as amended by that Act, as deemed to be replaced pursuant to paragraph (1) of that Article).

②With regard to the application of Article 140, paragraph (1) or Article 141, paragraph (1) of the New Act in the case where there is a Net Loss in 1971, the amount of income tax that forms the basis for calculating the refund under those provisions is the amount of income tax calculated by applying Article 3, paragraph (2) (Special Provisions on Income Deductions and Calculation of Tax Amounts for Income Tax for 1970) of the Supplementary Provisions (including Article 90, paragraph (2) of the New Act as deemed to be replaced pursuant to paragraph (1) of that Article).

①The provisions of Part IV, Chapter II, Section 1 (Obligation to Withhold Taxes from Salary Income and Amount Withheld) of the New Act and Appended Tables 4 through 6 of the New Act apply to salary or other wage as prescribed in Article 183, paragraph (1) (Obligation to Withhold Taxes) of the New Act (hereinafter referred to as "salary or other wage" in this Article) that is payable 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 salary or other wage payable before that date.

②The provisions of Article 190 (Year-End Adjustments) of the New Act as deemed to be replaced pursuant to Article 3, paragraph (1) (Special Provisions on Income Deductions and Calculation of Tax Amounts for Income Tax for 1970) of the Supplementary Provisions, and Appended Table 5 of the Supplementary Provisions and the attached table to that Table, apply in the case where the last payment of salary or other wage payable during 1970 is made on or after the Effective Date, and the provisions then in force continue to govern in the case where that last payment is made before the Effective Date.

③The provisions of Article 201 (Tax Withheld from Retirement Income) of the New Act as deemed to be replaced pursuant to Article 3, paragraph (1) of the Supplementary Provisions, and Appended Table 6 of the Supplementary Provisions and the annexed table to Appended Table 8 of the New Act, apply to severance pay or other such compensation as prescribed in Article 199 (Obligation to Withhold Taxes from Retirement Income) of the New Act (hereinafter referred to as "severance pay or other such compensation") that is payable during 1970 and is paid on or after the Effective Date, and the provisions then in force continue to govern severance pay or other such compensation payable during that year that was paid before that date.

①A person who, before the Effective Date, filed a return under Article 127 (Filing a Tax Return in the Case of Absence From Japan Partway Through the Year) of the Former Act (including as applied mutatis mutandis pursuant to Article 166 (Application Mutatis Mutandis to Nonresidents) of the Former Act) with regard to income tax for 1970, and a person who, before that date, received a determination under Article 25 (Determination) of the Act on General Rules for National Taxes (Act No. 66 of 1962) with regard to income tax for that year, may, if the application of the provisions of the New Act results in a change to the matters stated in that return or the matters pertaining to that determination (or, if a Reassessment under Article 24 (Reassessment) or Article 26 (Reassessment of Previous Reassessment) of that Act was made with respect to those matters before that date, the matters as they stand after that Reassessment), file a request for Reassessment under Article 23, paragraph (1) (Request for Reassessment) of the Act on General Rules for National Taxes with the district director by April 30, 1971, with respect to the matters to which that change applies.

②If a Reassessment under Article 24 or Article 26 of the Act on General Rules for National Taxes is made based on a request for Reassessment under the preceding paragraph, when calculating the interest on refund prescribed in Article 58, paragraph (1) (Interest on Refund) of the Act on General Rules for National Taxes for a refund under Article 159, paragraph (2) (Refund of Tax Withheld and Other Amounts Based on Reassessment or Determination) of the New Act (including as applied mutatis mutandis pursuant to Article 168 (Application Mutatis Mutandis to Nonresidents) of the New Act), the period under that paragraph that forms the basis for that calculation is the period from the Effective Date until the day of the decision to pay the refund or the day on which Appropriation of the refund under Article 57, paragraph (1) (Appropriation) of that Act (hereinafter referred to as "Appropriation") is made (or, if Appropriation became possible before that day, the day on which it became possible to make the Appropriation).