The Supreme Court of the United States held that an injunction providing for a "fixed buffer zone" around an abortion clinic and a cease and desist provision are valid, however, a "floating buffer zone" surrounding clinic patients violates the protesters' First Amendment right of free speech.
Schenck v. Pro-Choice Network of Western New York, 117 S. Ct 855 (1997).
Michael L. Utz,
Constitutional Law - First Amendment - Freedom of Speech - Prior Restraint,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol36/iss1/12