10.—(1) In default of a decision by any of the Welsh enforcement authorities under section 81(9)(a) of the 2004 Act as to the proportions in which their expenses under section 81 of that Act are to be defrayed, the authorities concerned shall refer the issue to an arbitrator nominated by the Chartered Institute of Arbitrators for him to determine.
(2) Where the Welsh Ministers are satisfied that there has been a failure on the part of any of the Welsh enforcement authorities to agree those proportions, they may give to the relevant joint committee such directions as are in their opinion necessary to secure that the issue is referred to arbitration in accordance with paragraph (1).
(3) In this regulation “the relevant joint committee” means the joint committee constituted under regulation 8 of which the enforcement authorities in default are constituent authorities.