Under Section 46(1), on and from the appointed date, which TWO Acts stood repealed, and the bodies constituted under them ceased to exist?

Section 46(1) simultaneously repeals the International Airports Authority Act, 1971 and the National Airports Authority Act, 1985, and declares that the IAAI and NAA constituted under those respective Acts cease to exist as separate entities, since their undertakings and functions have been consolidated into the single Airports Authority of India under Section 13. Section 46(2) then softens the effect of this repeal through a saving clause: anything done or action taken under the repealed Acts continues to be valid, in so far as it is not inconsistent with the new Act, and is deemed to have been done under the CORRESPONDING provisions of this Act - ensuring legal continuity for actions taken before the 1994 merger.