(1) The Board shall conduct the affairs of the Authority on sound commercial lines, and in particular, perform its functions under this Act as to ensure that, taking one year with another, the revenues of the Authority are greater than its outgoings properly chargeable to revenue account. .

(2) The Authority shall charge to revenue account the charges which, in the normal conduct of a business, are proper to be charged to revenue account, including proper provision for depreciation of assets or for renewal of assets, and in addition the interests on borrowings, repayments to be made each year in respect of loans incurred by the Authority to the extent that the repayments exceed provision of depreciation, and proper allocations to reserve.

(3) Without prejudice to the power of the Authority to establish appropriate reserves for replacements or any other purposes, the Authority shall establish a reserve fund and out of its profits make payments to the fund for the purpose of expanding its activities.

(4) The Board shall determine charges for the supply of electrical power so as to ensure that it is able to comply with the requirements of this section.