22.—(1) If it appears to the Department that buildings near an airport require further protection from noise and vibration attributable to use of the airport than can be given by measures taken or to be taken in pursuance of Article 21, the Department may by order make a scheme requiring the airport operator to make grants towards the cost of insulating those buildings or parts of those buildings against noise.
(2) A scheme under this Article may apply only to buildings of such a class or classes as may be specified in the scheme.
(3) A scheme under this Article shall specify the area or areas in which buildings must be situated for the grants to be payable, and the persons to whom, the expenditure in respect of which and the rate at which the grants are to be paid, and may make the payment of any grant dependent upon compliance with such conditions as may be specified in the scheme.
(4) A scheme under this Article may require the airport operator, in any case where an application for a grant is refused, to give the applicant at his request a written statement of the reasons for the refusal.
(5) Before making a scheme under this Article in relation to an airport, the Department shall consult the airport operator.