This Act comes into effect as of April 1, 1988.

With regard to working hours for the week that includes March 31, 1988, the provisions then in force continue to govern, notwithstanding the provisions of Article 32, paragraph (1), Article 33, Article 36, Article 37, Article 60, Article 64-2 and Article 66, paragraph (2) of the Labor Standards Act as amended by this Act (hereinafter referred to as the "new Act").

With respect to a worker whom an employer, at the time this Act comes into effect, is to have work under the provisions of Article 32, paragraph (2) of the Labor Standards Act prior to amendment by this Act (hereinafter referred to as the "former Act"), with regard to working hours for the period that includes March 31, 1988 among the fixed periods of not more than four weeks provided for in the rules of employment or other equivalent instrument based on the provisions of that paragraph, the provisions then in force continue to govern, notwithstanding the provisions of Article 32, Article 32-2, Article 33, Article 36, Article 37, Article 64-2 and Article 66, paragraph (2) of the new Act.

With regard to paid leave for a worker whose base date (meaning the day following the day on which the period of continuous service prescribed in Article 39, paragraph (1) of the new Act ends; the same applies hereinafter in this Article) is a day other than April 1 at the time this Act comes into effect, the provisions then in force continue to govern until the day before the first base date after the date on which this Act comes into effect, notwithstanding the provisions of Article 39, paragraphs (1) through (3) of the new Act.

With regard to paid leave for a worker who, from among the workers employed in a business prescribed in Article 133 of the new Act who are in continuous service on April 1, 1991, has as the base date as of that day a day other than April 1, from April 1 of that year until the day before the first base date after that day, the provisions of Article 39, paragraphs (1) through (3) of the new Act as applied before the first day of that month with the replacement of terms pursuant to that Article govern.

The provisions of the preceding paragraph apply mutatis mutandis to a worker who is employed in a business prescribed in Article 133 of the new Act and who is in continuous service on April 1, 1994.

With regard to the extinctive prescription of a claim for a retirement allowance that arose before this Act comes into effect, the provisions then in force continue to govern.

With regard to the application of penal provisions to acts committed before this Act comes into effect and to acts committed after this Act comes into effect with respect to matters that are to be governed by the provisions then in force pursuant to the provisions of Article 2 and Article 3, paragraph (1) of the Supplementary Provisions, the provisions then in force continue to govern.

Beyond what is provided for in Article 2 through the preceding Article of the Supplementary Provisions, transitional measures necessary in connection with the enforcement of this Act (including transitional measures concerning penal provisions) are specified by Cabinet Order.

In the case where three years have elapsed after this Act comes into effect, the government is to take into consideration the status of enforcement of the provisions of the new Act and, when it finds it necessary, is to review the provisions of the new Act and take necessary measures based on the results of that review.