S.I. 1999/991. In regulation 1 the definition of “out of jurisdiction appeal” was substituted by regulation 3(1) of the Social Security and Child Support (Miscellaneous Amendments) Regulations 2003 (S.I. 2003/1050). The definition of “official error” in regulation 1 and regulations 3(4A) and (5A), 9A and 31(1)(a), (b) and (c) were inserted, and regulations 32, 33 and 38A were amended, by the Social Security and Child Support (Decisions and Appeals) (Miscellaneous Amendments) Regulations 2002 (S.I. 2002/1379). The definition of “party to the proceedings” was amended by regulation 4(b) of the Tax Credits (Decisions and Appeals) (Amendment) Regulations 1999 (S.I. 1999/2570), regulation 2(c) of the Child Support (Decisions and Appeals) (Amendment) Regulations 2000 (S.I. 2000/3185) and regulation 15(1) of the Social Security (Jobcentre Plus Interviews for Partners) Regulations 2003 (S.I. 2003/1886). The definition of “referral” was amended by regulation 2(d) of the Child Support (Decisions and Appeals) (Amendment) Regulations 2000 (S.I. 2000/3185). Regulations 2, 16(3)(b)(ii), 30, 31 and 33 were amended by regulations 5, 21, 22 and 23 of the Tax Credits (Decisions and Appeals) (Amendment) Regulations 1999 (S.I. 1999/2570). Regulations 3A, 6A, 6B, 7B and 30A were inserted, and regulations 4(6)(b) and 30 were amended, by regulations 5, 6(e), 8, 11 and 12 of the Child Support (Decisions and Appeals) (Amendment) Regulations 2000 (S.I. 2000/3185). Regulation 3A(3) and (5A) were substituted by regulation 2(b) and (c) of the Child Support (Miscellaneous Amendments) Regulations 2002 (S.I. 2002/1204). Regulations 6(2)(c), 6A(4A), 7(33) and 7B(22A) were inserted by the Child Support (Decisions and Appeals) (Amendment) Regulations 2000 (S.I. 2000/3185). Regulations 6(2)(n) and 58A were inserted, and regulation 31 was amended, by regulation 2(4)(c), (8) and (19) of the Social Security, Child Support and Tax Credits (Miscellaneous Amendments) Regulations 2005 (S.I. 2005/337). Regulations 7(5), 16(4) and 20(2) and (3) were substituted by the Social Security and Child Support (Miscellaneous Amendments) Regulations 2000 (S.I. 2000/1596). Regulation 38A was inserted by regulation 2(4) of the Social Security and Child Support (Decisions and Appeals) Amendment (No 3) Regulations 1999 (S.I. 1999/1670). Regulation 9ZA was inserted, and regulations 29 and 31 were amended, by Schedule 2 of the Social Security (Recovery of Benefits) (Lump Sum Payments) Regulations 2008 (S.I. 2008/1596). Regulation 33(1) was amended by regulation 9 of the Social Security and Child Support (Decisions and Appeals), Vaccine Damage Payments and Jobseeker’s Allowance (Amendment) Regulations 1999 (S.I. 1999/2677) and by regulation 4 of the Child Support (Consequential Amendments and Transitional Provisions) Regulations 2001 (S.I. 2001/158). Regulations 3, 3A, 4, 6, 6A, 6B, 7, 7B, 8, 9A, 16, 20, 25 to 27 and 29 to 33 were revoked by the Child Benefit and Guardian’s Allowance (Decisions and Appeals) Regulations 2003 (S.I. 2003/916) so far as relating to child benefit or guardian’s allowance under the Social Security Contribution and Benefits Act 1992 (c.4).