Gross amounts to be accounted for

In all cases, the gross amounts due shall be collected and paid, or accounted for, to the City Council. No abatements or counter claim shall be admitted except in respect of commission to auctioneers, which shall be dealt with by deduction from the amounts realised by sales by auction, the net proceeds only being brought to account. Authority is required for other charges upon revenue of the City Council and such charges shall appear as expenditure supported by proper vouchers.