Based on members’ interests, UX has developed a cellular structure, with subgroups specialising in cartography, infiltration, tunnelling, masonry, internal communications, archiving, restoration and cultural programming. Its 100-odd members are free to change roles and are given access to all tools at the group’s disposal. There is no manifesto, no charter, no bylaws — save that all members preserve its secrecy. Membership is by invitation only; when the group notices people already engaged in UX-like activities, they discuss joining forces. Although there is no membership fee, members contribute what they can to projects.
