Amendment & Miscellaneous
(1) Sitting Federal Court judges became Supreme Court judges (unless they chose otherwise), with equivalent Article 125 salary/benefits. (2) Pending Federal Court cases transferred to the Supreme Court, with the Federal Court's prior judgments carrying the same force as if made by the Supreme Court. (3) The Privy Council's (His Majesty in Council's) pre-existing appellate jurisdiction over India remained valid where already legally authorised, with its post-commencement orders treated as Supreme Court orders. (4) The Privy Council's jurisdiction over former princely states (Part B states) ceased, with pending matters transferred to the Supreme Court. (5) Parliament could make further implementing provisions.
This managed the orderly transition of India's highest judicial authority from the colonial-era Federal Court (and, for certain appeals, ultimately the British Privy Council) to the new Supreme Court of India - ensuring pending cases, sitting judges, and existing judgments all transferred smoothly into the new system rather than creating a judicial vacuum or discontinuity.
This is why sitting Federal Court judges in 1950 simply continued as Supreme Court judges without needing fresh appointment, and why cases pending before that earlier court didn't need to be refiled from scratch - they transferred automatically.