Tariffs for supply of water and apparatus
20.—(1)  The prices to be charged for the supply of water by the Board and the hire of apparatus shall be in accordance with such tariffs as may from time to time be prescribed.
(2)  Nothing in this section shall prevent the Board from —
(a)charging other prices by special agreement which need not be prescribed; or
(b)fixing, with the approval of the Minister, different tariffs for consumers similarly situated for a temporary period.
(3)  The Board shall, in fixing tariffs and making agreements for the supply of water, neither show undue preference as between consumers similarly situated nor exercise undue discrimination as between persons similarly situated, having regard to the place and time of supply, the quantity supplied, and the purpose for which the supply is taken.