23. (1) A workman who claims compensation, or to whom compensation is payable under this act, shall, if so required by his employer, submit himself for examination by a duly qualified medical practitioner chosen and paid for by the employer, and shall, in addition, if so required by the Commission, submit himself for examination by the expert chosen by the latter.
(2) A workman shall not be required at the request of his employer to submit himself for examination otherwise than in accordance with the regulations.