Subject to the maximum limit specified in sub-section (1) of section 5, leave on half allowances may be granted to a Judge in excess of the amount at his credit—
(i)on medical certificate; or
(ii)otherwise than on medical certificate, for not more than six months 7[or for two or more periods, not exceeding in the aggregate, six months] during the whole period of his service as a Judge:
Provided that no such leave shall be granted if the Judge is not expected to return to duty at the end of such leave and earn the leave granted.