Administration of Justice Act 1970

7 Where the employer is required to comply with two or more attachment of earnings orders in respect of the same debtor, all or none of which orders are made to secure either the payment of judgment debts or payments under an administration order, then on any pay-day the employer shall, for the purpose of complying with Part I of this Schedule.—

(a) deal with the orders according to the respective dates on which they were made, disregarding any later order until an earlier one has been dealt with ;

(b) deal with any later order as if the earnings to which it relates were the residue of the debtor's earnings after the making of any deduction to comply with any earlier order.