The provisions of this Act come into effect on the dates specified in the following items, according to the categories set forth in those items:

①With regard to the standardized remuneration of a person who acquired the status of an insured covered by employees' pension insurance before November 1, 1973 and has continuously held the status of an insured up to that day (excluding a person who holds the status of a class 4 insured person and a person whose standardized remuneration is to be revised from that month), among those persons whose standardized monthly amount of remuneration in October of that year is 18,000 yen or less, or 134,000 yen (excluding a person whose monthly amount of remuneration is less than 138,000 yen), the prefectural governor revises the standardized remuneration by deeming the monthly amount of remuneration that was the basis of that standardized monthly amount of remuneration to be the monthly amount of remuneration that is the basis of the standardized remuneration under the provisions of Article 20 of the Employees' Pension Insurance Act as amended by this Act.

②The standardized remuneration revised pursuant to the provisions of the preceding paragraph is the standardized remuneration for each month from November 1973 to September 1974.

③Notwithstanding the provisions of Article 26 of the Employees' Pension Insurance Act, the standardized monthly amount of remuneration on or after November 1973 of a class 4 insured person under employees' pension insurance whose standardized monthly amount of remuneration is less than 20,000 yen is 20,000 yen.

①The amount of insurance premiums that a class 4 insured person under employees' pension insurance who, before November 1, 1973, prepaid insurance premiums for a period on or after that day is to additionally pay for each month of the period covered by the prepayment is, for each month of that period, the amount obtained by deducting, from the amount of insurance premiums that would be payable under the provisions of the Employees' Pension Insurance Act as amended by this Act if the person had not made the prepayment, the amount of insurance premiums that would be payable if the provisions of that Act prior to its amendment by this Act were applied.

②In the case where the amount of an employees' old-age pension under the Employees' Pension Insurance Act is calculated for a person who has the period prescribed in the preceding paragraph, if there is a month for which insurance premiums were not paid in the amount prescribed in that paragraph, the amount specified in Article 43 of that Act (including as applied pursuant to Article 44, paragraph (1) of that Act) or Article 9, paragraph (1) of the Supplementary Provisions of that Act is, notwithstanding those provisions, the amount obtained by deducting from the amount prescribed in those provisions the amount obtained by multiplying 540 yen by the number of months of the insured period under employees' pension insurance for the month for which the insurance premiums were not paid.

③The provisions of the preceding paragraph apply mutatis mutandis to a person who has the period prescribed in Article 9, paragraph (1) of the Supplementary Provisions prior to their amendment by the provisions of Article 6 of the Act Partially Amending the National Pension Act, etc. (Act No. 34 of 1985; hereinafter referred to as the "1985 Amendment Act") (hereinafter in this paragraph referred to as the "supplementary provisions before the amendment"), in the case where, when the amount of an employees' old-age pension is calculated on the basis of the portion of that period that is deemed, pursuant to the provisions of Article 47, paragraph (1) of the Supplementary Provisions of the 1985 Amendment Act, to be a period of having been an insured covered by employees' pension insurance, there is a month for which insurance premiums were not paid in the amount prescribed in Article 9, paragraph (1) of the supplementary provisions before the amendment.

With regard to the amount of pension insurance benefits under the Employees' Pension Insurance Act for months up to and including October 1973, the provisions then in force continue to govern.