With respect to the number of days specified by Order of the Ministry of Health, Labour and Welfare in consideration of the ratio between the number of days specified by Order of the Ministry of Health, Labour and Welfare as the number of prescribed working days per week for an ordinary worker referred to in Article 39, paragraph (3) of the Labor Standards Act (hereinafter referred to as the "Act") and the number of prescribed working days per week or the average number of prescribed working days per week for the worker concerned, for a worker who has been in continuous service for more than six months before the date on which this Ministerial Ordinance comes into effect (hereinafter referred to as the "effective date"), whose base date (meaning the day following the day on which the period of continuous service prescribed in Article 39, paragraph (1) of the Act ends; the same applies hereinafter in this Article) is a day other than April 1, and whose prescribed working hours per week are less than 30 hours, the provisions then in force continue to govern until the day preceding the first base date after the effective date, notwithstanding the provisions of Article 24-3, paragraph (3) of the Ordinance for Enforcement of the Labor Standards Act as amended (hereinafter referred to as the "new Rules").