Version 4.0 became effective in June 2004 Version 4.1 became effective in June 2007 Version 4.2 is in effect since June 2008 Version 4.3 is in effect since November 2011.
Version 4.0 nabyl účinnosti v červnu 2004 Version 4.1 nabyl účinnosti v červnu 2007 Version 4.2 používá se od června 2008 Version 4.3 používá se od listopadu 2011.