Initiative and Referendum Institute v. United States Postal Service

Issue: (1) Whether post office sidewalks that are open to the public are public fora, so that a prohibition of First Amendment activities must be narrowly tailored to further a significant governmental interest; and (2) even if post office sidewalks are not public fora, whether the 30 C.F.R. " 232.1(h)(4), the regulation banning signature gathering on petitions, is reasonable when it simultaneously permits the collection of signatures in voter registration drives on the same sidewalks, and when the justification for the latter provision (that it is the solicitation of a signature, rather than its collection, that may be disruptive) directly contradicts the justification for the former provision (that it is the collection of a signature, rather than its solicitation, that may be disruptive).