These Regulations amend the Universal Credit Regulations 2013 (S.I. 2013/376) (“the UC Regulations 2013”), the Social Security (Personal Independence Payment) Regulations 2013 (S.I. 2013/377) (“the PIP Regulations 2013”) and the Employment and Support Allowance Regulations 2013 (S.I. 2013/379) (“the ESA Regulations 2013”).