Added area 2711-31; ellipsoid 7049; geod datum 6610; geogCRS 4610; projCRS 2327-2390, 2401-2442. Amended names of areas 1118 (Hong Kong) and 1147 (Macau) to include non-ISO prefix "China - " and suffix "special administrative region". Changed name of datum 5104 from "Yellow Sea" to "Yellow Sea 1956" and added origin and epoch. Deprecated CRS 5704 and added CRS 5736. Added areas 2711-31; datums 5135-37 and 6611; proj 19978; CRS 2326-90 2401-42 4611 5737-39; tfm 1825 and 5405. Amended scope and added remarks to 21413-23. Deprecated projCRS 21473-83 and added 21453-63.