(1) The expenditure incurred by Bradford in any financial year shall, to the extent that it is not met from the fund established as mentioned in article 3(2), be apportioned among all the district councils in the county of West Yorkshire; and the appropriate proportion shall be recoverable by Bradford from each of the other district councils.
(2) For the purposes of paragraph (1)—
(a) the appropriate proportion in relation to any council is the proportion equal to that which the population of the area of that council bears to the population of the county; and
(b) the population of an area shall be taken to be the number estimated by the Registrar General and certified by him to the Secretary of State by reference to the 30th June which falls 21 months before the beginning of the financial year in which the recovery is made.
(3) Regulation 12 (apportionment of certain costs) of the Regulations mentioned in article 2 shall not apply to any costs which are met by virtue of any provision of this Order.
(4) In the event of a dispute between Bradford and another council as to the amount which is to be recoverable by Bradford pursuant to paragraph (1), the matter shall be referred to an arbitrator appointed by the Secretary of State; and section 31 of the Arbitration Act 1950 shall have effect in relation to that arbitration as if it were an arbitration to which that section applied.