(1) Where a disablement pension is payable in respect of an assessment of 50 per cent or more, then, where as a result of the relevant loss of faculty the beneficiary requires constant attendance, the weekly rate of the pension shall be increased by the amount set out in Part 4 of Schedule 2.

(2) An increase of pension under this section shall be payable for the period that may be determined at the time it is granted, but may be renewed from time to time but no increase shall be payable in respect of any period during which the beneficiary is receiving medical treatment as an in-patient in a hospital or similar institution.