It's already available a new global Guide that identifies and promotes globally emerging standards, protocols, and good practices.

This guidance prepared by the International Association of Convention Centres (AIPC), the International Congress and Convention Association (ICCA) and the Global Association of the Exhibition Industry (UFI) aims to help convention and exhibition centres, event and congress organizers and meeting destinations to prepare for a smooth, safe reopening of business following the initial outbreak of COVID-19.

See the document here