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ISO 20121:2012 specifies requirements for an event sustainability management system for any type of event or event-related activity, and provides guidance on conforming to those requirements.

ISO 20121:2012 is applicable to any organization that wishes to:

establish, implement, maintain and improve an event sustainability management system;

ensure that it is in conformity with its stated sustainable development policy;

demonstrate voluntary conformity with ISO 20121:2012 by

first party (self-determination and self-declaration),

second party (confirmation of conformance by parties having an interest in the organization, such as clients, or by other persons on their behalf), or

an independent third party (e.g. a certification body).

ISO 20121:2012 has been designed to address the management of improved sustainability throughout the entire event management cycle.