Revised stem
A public library board enacted a policy removing from its branch lobbies all bulletin-board postings that consist entirely of commercial advertisements for for-profit services. The policy was enacted because of a concern about the adverse visual effects of clutter and paper waste from flyers posted on the library bulletin boards. However, the library board continued to allow postings for community events, church announcements, charitable notices, and other non-commercial matters on the same bulletin boards. As a result of the policy, 15 of the 150 bulletin-board slots across the library system were cleared. Is this library-board policy constitutional?