19.—(1) Where a deduction from earnings order has been varied and a copy of the order as varied has been served on the liable person’s employer it shall, subject to paragraph (2), be the duty of the employer to comply with the order as varied.
(2) The employer shall not be under any liability for non-compliance with the order, as varied, before the end of the period of 7 days beginning with the date on which a copy of the order, as varied, was served on him.