IEC/EN 60950-1:

Option 1: IEC 60950-1:2005 ;
          EN60950-1:2006+A11:2009
Option 2: IEC 60950-1:2005+A1:2009 ;
          EN60950-1:2006+A11:2009+A1:2010
Option 3: IEC 60950-1:2005+A1:2009 ;
          EN 60950-1:2006+A11:2009+A1:2010+A12:2011

Transition Period of EN60950-1 第二版

Standard	DOR	DAV	DOA	DOP	DOW(上一版本失效日)	停止發證	證書失效
EN 60950-1:2006	2005-12-01	2006-04-14	2006-12-01	2006-12-01	2010-12-01	2010-12-01	2010-12-01
EN 60950-1/A11:2009	2008-12-01	2009-03-06	2009-06-01	2011-03-01	2010-12-01	2013-03-01	2013-03-01
EN 60950-1 /A1:2010	2010-03-01	2010-03-12	2010-09-01	2011-03-01	2013-03-01	2013-01-24	2013-01024
EN 60950-1 /A12:2011	2011-01-24	2011-02-25	2011-07-24	2012-01-24	2013-01-24	Not issued	Not issued

DOR(核准日期): Date of Ratification
DAV(生效日期): Date of Availability
DOA(頒布日期): Date of Announcement
DOP(出版日期): Date of Publication
DOW(撤銷日期): Date of Withdrawal