This Ministerial Ordinance comes into effect as of the date of promulgation; provided, however, that the part pertaining to the location in the amended provisions concerning the Daishoji Labor Standards Office applies as of January 1, 1958, the part pertaining to the location in the amended provisions concerning the Kameido Labor Standards Office applies as of April 1, 1958, and the part pertaining to the location in the amended provisions concerning the Tomioka Labor Standards Office applies as of May 1, 1958, respectively.