IEC 62052-21 Ed. 1.1 b:2016

IEC 62052-21:2004+A1:2016 specifies general requirements for the type test of newly manufactured indoor tariff and load control equipment, like electronic ripple control receivers and time switches that are used to control electrical loads, multi-tariff registers and maximum demand indicator devices.
This consolidated version consists of the first edition (2004) and its amendment 1 (2016). Therefore, no need to order amendment in addition to this publication.