(1) An employee shall, after examination at the expense of the
employer—
(a) by a registered medical practitioner duly appointed by the
employer; or
(b) if no such medical practitioner is appointed or, if having
regard to the nature or circumstances of the illness, the
services of the medical practitioner so appointed are not
obtainable within a reasonable time or distance, by any
other registered medical practitioner or by a medical
officer,