Added datum 6896, CRS 4896, tfm 15698. For datums 6647-6653, amended name and added previous name as alias. For datums 6654-55, in name changed IERS to International. For datum 6656, in name changed IERS to International, added supersession remarks. For CRS 4919, added supersession remarks, changed area code from 2830 to 1262.