①With regard to the calculation of the amount, for periods on or after the effective date, of a pension-type insurance benefit that a person who, in respect of a disability (including being in a state of disability due to an injury or illness) or death arising from the same reason in the course of their duties or from commuting, had the right to receive a pension-type insurance benefit on the day before the effective date and also has the right to receive a pension-type insurance benefit on or after the effective date, has the right to receive on or after the effective date (hereinafter referred to as a "post-effective-date pension benefit" in this paragraph), if the basic daily payment amount under Article 8 of the Industrial Accident Insurance Act that was used as the basis for the calculation of the amount of the pension-type insurance benefit that the person had the right to receive on the day before the effective date (hereinafter referred to as a "pre-effective-date pension benefit" in this Article) (if the amount of that pre-effective-date pension benefit to be paid on that day had been revised pursuant to the provisions of Article 64, paragraph (1) of the Industrial Accident Compensation Insurance Act before its amendment by the provisions of Article 1 (including as applied mutatis mutandis pursuant to paragraph (2) of that Article), the amount obtained by multiplying that basic daily payment amount by the same rate as the rate used for that revision (if that amount includes a fraction of less than one yen, the fraction is rounded up to one yen); hereinafter referred to as the "pre-effective-date basic daily payment amount" in this Article) exceeds, among the amounts specified by the Minister of Health, Labour and Welfare referred to in Article 8-2, paragraph (2), item (ii) of the Industrial Accident Compensation Insurance Act as amended by the provisions of Article 2 of the Act Partially Amending the Industrial Accident Compensation Insurance Act, etc. (Act No. 40 of 1990), as applied mutatis mutandis pursuant to Article 8-3, paragraph (2) of that Act, the amount pertaining to the age group to which the worker who is to receive the pension-type insurance benefit prescribed in that item pertaining to that post-effective-date pension benefit belongs as of the base date, then, notwithstanding the provisions of Article 8-3, paragraph (1) of that Act and Article 8-2, paragraph (2) of that Act as applied mutatis mutandis pursuant to paragraph (2) of that Article, the pre-effective-date basic daily payment amount is to be the basic daily pension benefit amount prescribed in Article 8-3, paragraph (1) of that Act pertaining to that post-effective-date pension benefit.

②If the pre-effective-date pension benefit is a compensation pension for surviving family or a pension for surviving family, and, on or after the effective date, that compensation pension for surviving family or pension for surviving family is paid to the person who holds the next rank pursuant to the provisions of the second sentence of Article 16-4, paragraph (1) of the Industrial Accident Insurance Act (including as applied mutatis mutandis pursuant to Article 22-4, paragraph (3) of the Industrial Accident Insurance Act), or is paid to the person who holds the next rank as the person with the first rank pursuant to the provisions of the second sentence of Article 16-5, paragraph (1) of the Industrial Accident Insurance Act (including as applied mutatis mutandis pursuant to Article 22-4, paragraph (3) of the Industrial Accident Insurance Act), the provisions of the preceding paragraph apply by deeming that person who holds the next rank to have had the right to receive that compensation pension for surviving family or pension for surviving family on the day before the effective date.

③In the case where the amount of a pension-type insurance benefit is to be calculated and paid with the pre-effective-date basic daily payment amount as the basic daily pension benefit amount prescribed in Article 8-2, paragraph (1) of the new Industrial Accident Insurance Act pursuant to the provisions of paragraph (1), if the amount of that pension-type insurance benefit is to be revised and paid pursuant to the provisions of Article 64, paragraph (1) of the new Industrial Accident Insurance Act (including as applied mutatis mutandis pursuant to paragraph (3) of that Article; the same applies hereinafter in this Article), notwithstanding the provisions of paragraph (1) of that Article, that pension-type insurance benefit is paid in the amount of pension calculated as if that revision were not made.

④With regard to the application of the provisions of the new Industrial Accident Insurance Act set forth in the following items in relation to the amount of a pension-type insurance benefit calculated pursuant to the provisions of the preceding paragraph, the amount that would be obtained if the amount specified in the respective items were assumed to have been revised pursuant to the provisions of Article 64, paragraph (1) of the new Industrial Accident Insurance Act using the same rate as the rate pertaining to the revision under that paragraph that would be used if the amount of that pension-type insurance benefit were calculated without applying the provisions of the preceding paragraph, and that revision were then assumed not to have been made, is deemed to be the amount specified in the respective items: