No person shall engage in a demonstration within the Supreme Court building and grounds. The term “demonstration” includes demonstrations, picketing, speechmaking, marching, holding vigils or religious services and all other like forms of conduct that involve the communication or expression of views or grievances, engaged in by one or more persons, the conduct of which is reasonably likely to draw a crowd or onlookers. The term does not include casual use by visitors or tourists that is not reasonably likely to attract a crowd or onlookers. Approved and Effective June 13, 2013I also found this, which I suppose needs to be factored in.
[Via Jeff H]