These Regulations, which come into force on 6th April 2014, amend the Social Security (Contributions) Regulations 2001 (S.I. 2001/1004) (“the principal Regulations”). They are made in consequence of the annual re-rating order made under section 141 of the Social Security Administration Act 1992 (c. 5) and section 129 of the Social Security Administration (Northern Ireland) Act 1992 (c. 8).