http://www.legislation.gov.uk/ukpga/1999/33/section/154Immigration and Asylum Act 1999An Act to make provision about immigration and asylum; to make provision about procedures in connection with marriage on superintendent registrar’s certificate; and for connected purposes.1999-11-22texttext/xmlenStatute Law Database2026-04-09Expert Participation2026-04-07 Immigration and Asylum Act 1999s. 94(3)(3A)Nationality, Immigration and Asylum Act 2002s. 44(4)s. 159s. 162(1)Immigration and Asylum Act 1999Sch. 2 para. 21Nationality, Immigration and Asylum Act 2002s. 23(2)(a)s. 159s. 162(1)Immigration and Asylum Act 1999Sch. 3 para. 2(5)Nationality, Immigration and Asylum Act 2002s. 23(2)(b)s. 159s. 162(1)Immigration and Asylum Act 1999s. 146(2)(za)Immigration Act 2016s. 44(9)s. 94(1)Immigration and Asylum Act 1999s. 94(2A)-(2C)Immigration Act 2016Sch. 11 para. 3(3)s. 94(1)Immigration and Asylum Act 1999s. 94(3A)-(3D)Immigration Act 2016Sch. 11 para. 3(5)s. 94(1)Immigration and Asylum Act 1999s. 94(2D)Immigration Act 2016Sch. 11 para. 7(4)s. 94(1)Immigration and Asylum Act 1999s. 95AImmigration Act 2016Sch. 11 para. 9s. 94(1)Immigration and Asylum Act 1999s. 96(1A)Immigration Act 2016Sch. 11 para. 10(3)s. 94(1)Immigration and Asylum Act 1999s. 97(8)(9)Immigration Act 2016Sch. 11 para. 11(4)s. 94(1)Immigration and Asylum Act 1999s. 98AImmigration Act 2016Sch. 11 para. 13s. 94(1)Immigration and Asylum Act 1999s. 125(2)(ba)Immigration Act 2016Sch. 11 para. 22(3)(b)s. 94(1)Immigration and Asylum Act 1999s. 166(5)(ca)Immigration Act 2016Sch. 11 para. 24(2)s. 94(1)Immigration and Asylum Act 1999s. 166(5A)(5B)Immigration Act 2016Sch. 11 para. 24(3)s. 94(1)Immigration and Asylum Act 1999s. 166(6)(aa)Immigration Act 2016Sch. 11 para. 24(4)s. 94(1)Immigration and Asylum Act 1999s. 97(3A)(b)(iv)Nationality and Borders Act 2022s. 13(2)(c)(ii)s. 87(1)Immigration and Asylum Act 1999s. 98A(5)Nationality and Borders Act 2022s. 13(4)s. 87(1)Immigration and Asylum Act 1999s. 72(10)Asylum and Immigration (Treatment of Claimants, etc. ) Act 2004Sch. 4s. 48(3)Immigration and Asylum Act 1999s. 103(4)(a)Asylum and Immigration (Treatment of Claimants, etc. ) Act 2004s. 10(4)(b)s. 10(6)s. 48(3)art. 2Immigration and Asylum Act 1999s. 103A(1)Asylum and Immigration (Treatment of Claimants, etc. ) Act 2004s. 10(5)s. 10(6)s. 48(3)art. 2Immigration and Asylum Act 1999s. 103A(1) headingAsylum and Immigration (Treatment of Claimants, etc. ) Act 2004s. 10(5)s. 10(6)s. 48(3)art. 2Immigration and Asylum Act 1999s. 87(3AA)-(3AC)Border Security, Asylum and Immigration Act 2025Sch. 1 para. 5(2)s. 65(1)Immigration and Asylum Act 1999s. 87(3D)Border Security, Asylum and Immigration Act 2025Sch. 1 para. 5(3)s. 65(1)Immigration and Asylum Act 1999s. 87(4A)Border Security, Asylum and Immigration Act 2025Sch. 1 para. 5(5)s. 65(1)Immigration and Asylum Act 1999Sch. 6 para. 4AABorder Security, Asylum and Immigration Act 2025Sch. 1 para. 6(2)s. 65(1)Immigration and Asylum Act 1999Sch. 6 para. 4CBorder Security, Asylum and Immigration Act 2025Sch. 1 para. 6(4)s. 65(1)Immigration and Asylum Act 1999s. 84(3C)Border Security, Asylum and Immigration Act 2025Sch. 1 para. 7s. 65(1)Immigration and Asylum Act 1999Sch. 5 para. 5(3)(ba)Border Security, Asylum and Immigration Act 2025Sch. 1 para. 14(2)s. 65(1)Immigration and Asylum Act 1999Sch. 5 para. 6(2A)(2B)Border Security, Asylum and Immigration Act 2025Sch. 1 para. 14(3)(b)s. 65(1)Immigration and Asylum Act 1999Sch. 5 para. 9A-9C and cross-headingBorder Security, Asylum and Immigration Act 2025Sch. 1 para. 14(5)s. 65(1)Immigration and Asylum Act 1999s. 103(5)(b)The Transfer of Tribunal Functions Order 2008Sch. 3 para. 183(ii)art. 1(1)Immigration and Asylum Act 1999s. 103A(1)The Transfer of Tribunal Functions Order 2008Sch. 3 para. 184art. 1(1)Immigration and Asylum Act 1999s. 10(12)Illegal Migration Act 2023s. 10(6)s. 55(9)s. 68(1) Part VIII1541On an application made to him under this section, the Secretary of State may certify that the applicant—ais authorised to perform escort functions; orbis authorised to perform both escort functions and custodial functions.2The Secretary of State may not issue a certificate of authorisation unless he is satisfied that the applicant—ais a fit and proper person to perform the functions to be authorised; andbhas received training to such standard as the Secretary of State considers appropriate for the performance of those functions.3A certificate of authorisation continues in force until such date, or the occurrence of such event, as may be specified in the certificate but may be suspended or revoked under paragraph 7 of Schedule 11.4A certificate which authorises the performance of both escort functions and custodial functions may specify one date or event for one of those functions and a different date or event for the other.5The Secretary of State may confer functions of detainee custody officers on prison officers or prisoner custody officers.6A prison officer acting under arrangements made under subsection (5) has all the powers, authority, protection and privileges of a constable.7Schedule 11 makes further provision about detainee custody officers.S. 154 wholly in force at 2.4.2001; s. 154 not in force at Royal Assent; s. 154(1)-(6) fully in force and s. 154(7) in force for certain purposes at 3.4.2000 and s. 154(7) in force for certain purposes at 1.8.2000 by S.I. 2000/1985, art. 2, Sch.; s. 154 in force so far as not already in force at 2.4.2001 by S.I. 2001/239, art. 2, Sch.S. 154(5) substituted (10.2.2003) by Nationality, Immigration and Asylum Act 2002 (c. 41), ss. 65(1), 162(1) (with s. 159); S.I. 2003/1, art. 2, Sch.Pt. VIII modified (E.W.N.I.) (31.1.2008) by UK Borders Act 2007 (c. 30), ss. 2(6), 59(2); S.I. 2008/99, art. 2(a)