Under Section 18(5), officers or employees who had already RETIRED from IAAI or NAA before the appointed day and were entitled to certain benefits shall:

Section 18(5) extends the continuity principle even to persons who had already retired before the appointed day: such retirees remain entitled to receive from the Authority the SAME benefits, rights, or privileges (pension, gratuity, and similar retirement benefits) they were entitled to from IAAI or NAA, without any reduction, re-application requirement, or diversion of liability to the Central Government. This complements Section 18(6), which similarly ensures that Provident Fund and Group Insurance/Superannuation Scheme trusts of IAAI/NAA continue functioning within the Authority exactly as before, preserving both currently serving and already-retired employees' financial continuity across the 1994 merger.