This Act comes into effect on April 1, 2004; provided, however, that the provisions set forth in the following items come into effect on the dates specified respectively in those items:

The provisions of Article 70, paragraph (1) of the Act on General Rules for National Taxes as amended by the provisions of Article 5 (referred to as "the new Act on General Rules for National Taxes" in the following paragraph) apply to corporation tax for which the due date or date specified in item (i) of that paragraph arrives on or after the effective date, and the provisions then in force continue to govern corporation tax for which that due date or date arrived before the effective date.

The provisions of Article 70, paragraph (2) of the new Act on General Rules for National Taxes apply to the amount of net loss, etc. (meaning the amount of net loss, etc. prescribed in Article 2, item (vi), (c) of the new Act on General Rules for National Taxes; the same applies hereinafter in this paragraph) that arose in a business year, calculation period, or consolidated business year of a corporation that began on or after April 1, 2001, and the provisions then in force continue to govern the amount of net loss, etc. that arose in a business year, calculation period, or consolidated business year of a corporation that began before that date.

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