A limited public forum is opened only for designated speakers or subjects, such as a school meeting room reserved for community organizations. Government may enforce reasonable boundaries consistent with that purpose, but may not discriminate by viewpoint within the permitted subject. A nonpublic forum-for example, a secure military installation or an internal government workplace-has not been opened for general public expression. Restrictions there need only be reasonable in light of the property's function and viewpoint neutral. Ownership alone is not decisive: not every public building is a public forum.

The analysis begins with classification, then turns to the restriction. A city may reserve a courtroom for judicial business because open demonstrations would interfere with its function. It may not allow courtroom-related advocacy from supporters while excluding critics solely because of their position. Similarly, an airport terminal does not automatically receive the same treatment as a public sidewalk simply because the government operates it. The history and intended use of the space matter.

Suppose a city permits all civic groups to use a community hall on weekends, then rejects an environmental group because officials oppose its policies. Opening the hall created at least a limited forum, and the viewpoint-based denial is unconstitutional. A neutral reservation limit applied to every group is different. First classify the forum; only then select the standard. The same rule can be invalid in a public park yet reasonable in a secure, nonpublic facility.

Video lesson: First Amendment Rights of Assembly, Petition and Association: Module 4 of 5