A landlord, on paying to the tenant the amount due to him under Part I of this Act, in respect of compensation for an improvement . . . . . . F1 under that Part, or on expending after notice given in accordance with that Part such amount as may be necessary to execute an improvement, shall be entitled to obtain from the Minister of Agriculture and Fisheries (hereinafter referred to as the Minister) an order in favour of himself and the persons deriving title under him charging the holding, or any part thereof, with repayment of the amount paid or expended, including any proper costs, charges or expenses incurred by a landlord in opposing any proposal by a tenant to execute an improvement or in contesting a claim for compensation, and of all costs properly incurred by him in obtaining the charge, with such interest, and by such instalments, and with such directions for giving effect to the charge, as the Minister thinks fit.