<s>[INST] How does the law impact those who retired or otherwise ceased to be in service at any time before the Twenty-eighth Amendment Act, 1972? [/INST] The law impacts those who retired or otherwise ceased to be in service at any time before the Twenty-eighth Amendment Act, 1972 by providing Parliament with the power to vary or revoke their conditions of service as respects pension, whether prospectively or retrospectively. </s>