http://www.legislation.gov.uk/ukpga/1991/56/section/21Water Industry Act 1991 An Act to consolidate enactments relating to the supply of water and the provision of sewerage services, with amendments to give effect to recommendations of the Law Commission.1991-07-25texttext/xmlenStatute Law Database2026-05-01Expert Participation2026-04-30 Part II APPOINTMENTMENT AND REGULATION OF UNDERTAKERS CHAPTER II ENFORCEMENT OF INSOLVENCY Enforcement orders Validity of enforcement orders.211If the person to whom an enforcement order relates is aggrieved by the order and desires to question its validity on the ground—athat its making or confirmation was not within the powers of section 18 above; orbthat any of the requirements of section 20 above have not been complied with in relation to it,the person may, within forty-two days from the date of service on it of a copy of the order, make an application to the High Court under this section.2On any such application the High Court may, if satisfied that the making or confirmation of the order was not within those powers or that the interests of the person have been substantially prejudiced by a failure to comply with those requirements, quash the order or any provision of the order.3Except as provided by this section, the validity of an enforcement order shall not be questioned in any legal proceedings whatsoever.Word in s. 21(2) substituted (1.4.2016) by Water Act 2014 (c. 21), s. 94(3), Sch. 7 para. 29(3); S.I. 2016/465, art. 2(m), Sch. 1 para. 1(j) (with Sch. 2) (as amended (22.3.2017) by S.I. 2017/462, art. 16)Words in s. 21(1) substituted (1.4.2016) by Water Act 2014 (c. 21), s. 94(3), Sch. 7 para. 29(2)(a); S.I. 2016/465, art. 2(m), Sch. 1 para. 1(j) (with Sch. 2) (as amended (22.3.2017) by S.I. 2017/462, art. 16)Word in s. 21(1) substituted (1.4.2016) by Water Act 2014 (c. 21), s. 94(3), Sch. 7 para. 29(2)(b); S.I. 2016/465, art. 2(m), Sch. 1 para. 1(j) (with Sch. 2) (as amended (22.3.2017) by S.I. 2017/462, art. 16)