A presiding officer of a Labour Court or Tribunal or, as the case may be, National Tribunal, constituted under the Industrial Disputes Act, 1947, holding office as such immediately before the commencement of this Code and is qualified to be appointed under this Code, shall be the Judicial Member of the Tribunal or, as the case may be, the Judicial Member of the National Industrial Tribunal, and shall continue as such for the remaining period of his office.