Valuation of appreciation in land value
12.—(1)  Where any person makes a request under section 39(2) of the Act in relation to any development charge in respect of any land, the competent authority shall, unless it considers that written permission to develop the land will not be granted, forward the request together with all the necessary information relating thereto to the Chief Valuer.
(2)  The Chief Valuer shall, as soon as practicable, forward to the competent authority a valuation report on the appreciation in the value of the land arising from the grant of written permission to develop the land.
(3)  Upon receipt of the valuation report, the competent authority shall by order determine the development charge payable in accordance with rule 10.