We noted probable jurisdiction to decide whether the United States District Court for the Southern District of *116 New York correctly determined that 18 U. S. C. § 1725, which prohibits the deposit of unstamped "mailable matter" in a letterbox approved by the United States Postal Service, unconstitutionally abridges the First Amendment rights of certain civic associations in Westchester County, N. Y. 449 U. S. 1076 (1981). Jurisdiction of this Court rests on 28 U. S. C. § 1252.

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