Expenses10.
(1)
The relevant riparian authorities must contribute towards the expenses incurred by the joint board by virtue of the authority conferred upon it by this Order in accordance with this article.
(2)
In this article “the sum” means the sum which is obtained by adding together the following—
(a)
the number of Band D equivalent properties in the area of Weymouth and Portland Borough Council;
(b)
half the number of Band D equivalent properties in the maritime parishes in the area of West Dorset District Council, namely Abbotsbury, Chickerell, Fleet, Langton Herring, Osmington and Owermoigne; and
(c)
half the number of Band D equivalent properties in the maritime parishes in the area of Purbeck District Council, namely Chaldon Herring, Corfe Castle, East Lulworth, Kimmeridge, Steeple, Tyneham, West Lulworth and Worth Matravers.
(3)
Weymouth and Portland Borough Council must contribute towards the expenses in the proportion which the number referred to in paragraph (2)(a) bears to the sum.
(4)
West Dorset District Council must contribute towards the expenses in the proportion that the number referred to in paragraph (2)(b) bears to the sum.
(5)
Purbeck District Council must contribute towards the expenses in the proportion that the number referred to in paragraph (2)(c) bears to the sum.