22The Council shall have power to issue precepts for the levying of rates to meet all liabilities falling to be discharged by the Council for which provision is not otherwise made; and any such precept may include as separate items contributions for general and special London purposes respectively and shall be so issued as to secure that the rate is levied—
(a)in the case of a rate to meet liabilities in respect of expenditure for general London purposes, on the whole of Greater London; and
(b)in the case of a rate to meet liabilities in respect of expenditure for a special London purpose, on the area chargeable therewith.