4.—(1) Subject to the provisions of this Scheme, the Secretary of State may make a grant under this Part of this Scheme to a crofter or eligible occupier towards the approved cost of any operation of a kind specified in the Schedule to this Scheme carried out by him or on his behalf for the purpose of aiding and developing agricultural production, in the case of a crofter, on his croft and, in the case of an eligible occupier, on the croft or holding or part of a croft, as the case may be, in respect of which he is the eligible occupier.
(2) For the purpose of this paragraph, “approved cost” shall mean the cost approved for the purposes of a grant under this Part of this Scheme and comprising the aggregate of—
(a)the expenditure reasonably incurred by the application in respect of materials required for the purpose of carrying out the relevant operation, and
(b)such sum as the Secretary of State may deem it reasonable to allow in respect of the labour necessary for that purpose.