BSI BS EN 60061-1 + A53 Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 1: Lamp caps - AMD 9694: November 1997; AMD 10186: February 1999; AMD 10583: December 1999; AMD 11008: July 2001; AMD 13245: March 27, 2002; AMD 14106: January 9, 2003; AMD 14568: November 28, 2003; AMD 14961: February 25, 2004; AMD 15488: February 10, 2005; AMD: June 30, 2010: AMD: November 30, 2011; AMD: April 30, 2013; AMD: June 30, 2015; AMD: March 31, 2016