In this Act— “ the principal Act ” means the M1 Social Security Act 1975; “ the Pensions Act ” means the M2 Social Security Pensions Act 1975; “ the Act of 1976 ” means the M3 Supplementary Benefits Act 1976; “ the Act of 1977 ” means the M4 Social Security (Miscellaneous Provisions) Act 1977. Marginal Citations M1 1975 c. 14 . M2 1975 c. 60 . M3 1976 c. 71 . M4 1977 c. 5 .