For organizations already certified to ISO 50001 version 2011, international rules allow three years from publication of the new standard to update the energy management system and switch to the new version. Due in 2021. This transition can take place during the certification cycle or at the time of a renewal audit. For those wishing to adopt ISO 50001 in 2019, the choice is left to them, but it is advisable to favor the new version. Especially as from March1, 2020, all ISO 50001 audits will be conducted according to the 2018 version.
