Salve: Let me argue on retrospectivity. There's... ... Chandrababu Naidu's Case : Live Updates From Supreme Court

Salve: Let me argue on retrospectivity. There's one case that explains it well. A retrospective legislation is one that impairs past rights. Rights are between citizens and upon citizens. Between State and citizens, even a substantive law is considered to be retrospective if it confers new rights. A classic example is Probation of Offenders Act.