3SSubject to paragraph 4 below, where the debts comprise both ordinary debts and current maintenance, then, in any such disbursement—
(a)if only one of the debts is an ordinary debt, the creditor in that debt shall be paid the sum which would be payable to him if the debt were being enforced by an earnings arrestment;
(b)if more than one of the debts is an ordinary debt, each of the creditors in those debts, out of the sum which would be payable to a creditor if the debt were a single debt being enforced by an earnings arrestment, shall be paid the same proportion of the amount of his debt;
(c)if only one of the debts is current maintenance, the creditor in that debt shall be paid the sum which would be payable to him under section 51 of this Act if the debt were being enforced by a current maintenance arrestment;
(d)if more than one of the debts is current maintenance, each of the creditors in those debts shall receive a payment in accordance with paragraph 2 of this Schedule.