These regulations amend the Social Security (Credits) Regulations 1975 (S.I. 1975/556), the Social Security and Child Support (Decisions and Appeals) Regulations 1999 (S.I. 1999/991), the Social Security (Crediting and Treatment of Contributions, and National Insurance Numbers) Regulations 2001 (S.I. 2001/769) and the Universal Credit, Personal Independence Payment, Jobseeker’s Allowance and Employment and Support Allowance (Decisions and Appeals) Regulations 2013 (S.I. 2013/381). The amendments are consequential on the changes made by the National Insurance Contributions Act 2015 (c.5) to reform the payment and collection of Class 2 contributions, and the introduction of accelerated payment of contributions by that Act. These Regulations also make various tidying-up miscellaneous amendments.