Deprecated tfm 1681. Added area 2792-2803, vert datum 5138-5148, vertCRS 5740-50; coord op param 8668-8693, coord op method 9637, tfm 1039-42. Amended remarks to tfm 1036. Added remarks to geod datum 6277. Amended name of datum 5131 and added previous name as abbreviation; added abbreviation to vertCRS 5732. Changed remarks for tfm 1314 to refer to 1039 rather than 1036.