European Commission for Democracy Through Law and OSCE ODIHR, Guidelines on Freedom of Peaceful Assembly (3rd edition)

“…These Guidelines are primarily focused on ‘assemblies’ that are an intentional gathering of a number of individuals in a publicly accessible space for a common expressive purpose.
The Guidelines apply primarily to assemblies held in ‘public spaces’ – sites that are open to the public and which, independently of possible private ownership, are generally accessible to everyone…
…These guidelines also take in account the role of internet including both the opportunities and challenges it presents for assembly organizers, participants and law enforcement personnel. Furthermore, the scale of the presence at assemblies of violent persons or groups aiming at disrupting them, as well as continued occupation of public or private premises, have posed specific problems for the authorities.” (p.8-9)