Deprecated areas 1357 and 1805, datum 6317, CRSs 2492-93, 4317, 28402-03 and 31700 and tfms 1097, 1287-89, 1292-93 and 1996. Added areas 3574-88, CRSs 3833-44 and tfms 15496-97 and 15995-99. For areas 1513-14, amended name, area of use and bounding box. For area 1793, added FSU to name and deleted Slovakia from area of use (used by CRSs 2494 and 28404). For datums 6178-79, amended name, changed alias naming system, added remarks and changed area code to 3574 (E Europe). For CRS 4178, changed area code from 1343 (E Germany) to 3574 (E Europe); added aliases and remarks. For CRS 4179, changed area code from 1192 (Poland) to 3574 (E Europe); added aliases and remarks. For CRS 4200, added alias. For datum 6284, amended name and changed area code to 2423 (FSU). For datum 6284 and CRS 4284, changed area code from 1357 (E Europe + FSU) to 2423 (FSU), added alias and remarks to CRS. For CRSs 2397-98, reversed name and alias, amended scope and remarks. For CRS 2399, reversed name and alias, changed area code, amended scope and remarks. For CRSs 3329-32, changed area code, amended scope and added remarks. For CRSs 3396-99 and 31466-69, reversed name and alias. For datum 6317, CRSs 4317 and 31600, and tfm 1995, in names changed 33 to 30 and made previous names aliases.