2(1)The weekly rate of a disablement pension shall, if as the result of the relevant loss of faculty the beneficiary is incapable of work and likely to remain so permanently, be increased by the amount specified in Schedule 4, Part V, paragraph 5.N.I.
(2)An increase of pension under this paragraph is referred to in this Act as an “unemployability supplement”.
(3)For the purposes of this paragraph a person may be treated as being incapable of work and likely to remain so permanently, notwithstanding that the loss of faculty is not such as to prevent him being capable of work, if it is likely to prevent his earnings in a year exceeding a prescribed amount not less than £104.
(4)An unemployability supplement shall be payable for such period as may be determined at the time it is granted, but may be renewed from time to time.