The statute regulating (not “barring” or “prohibiting”) use of the presidential seal is drafted with care. Under Section 713, one commits a crime only by displaying the seal “in a manner reasonably calculated to convey a false impression of sponsorship or approval by the government of the United States or by any department, agency, or instrumentality thereof.” This language, borrowed from the law of unfair competition, is narrowly drafted to avoid trampling on First Amendment rights. Displaying a likeness of the seal is prohibited only when the use will create the “false impression of sponsorship or approval” — what courts in other contexts call “confusion as to source.”