http://www.legislation.gov.uk/uksi/1981/330/madeThe Social Security Pensions (Home Responsibilities and Graduated Retirement Benefit) Amendment Regulations 1981enKing's Printer of Acts of Parliament1981-03-12 The Social Security Pensions (Home Responsibilities and Graduated Retirement Benefit) Amendment Regulations 1981InstrumentThe Social Security Pensions (Home Responsibilities) Regulations 1994reg. 3 Schreg. 1(1)