Local Government Act 1993 No 30
Current version for 1 July 2020 to date (accessed 4 August 2020 at 18:57)
696   Apportionment of expenses
If because of this Act or the regulations—
(a)  two or more persons are or may be directed by the council to do or join in doing any act or to pay or join in paying any sum of money, costs or expenses, or
(b)  the council permits two or more persons to join together in doing any act or paying any sum of money, costs or expenses,
the council may apportion the matter to be done or the sum of money, costs or expenses to be paid between those persons in whatever manner the council thinks just and reasonable, and the act is to be done or the money, costs or expenses are to be paid accordingly.