61In Schedule 3 to the [1954 c. 70.] Mines and Quarries Act 1954, at the end of paragraph 1 (constitution of tribunals to inquire into whether a certificate of competency granted under that Act should be withdrawn or suspended) there shall be added the words “; but no person shall be appointed—
(a)as the person, or one of the persons, constituting such a tribunal, or
(b)as an assessor to assist any such tribunal,
after the day on which he attains the age of seventy years.”