Only one receiver may give a signal for a fair catch while any legal kick is in flight

The statement is "False".

As indicated by the section 5: Fair catch- Art. 1 of Football- Rule: Kicking the Ball and Fair Catch , any receiver may signal for a fair catch while any legal kick is in flight. Any receiver who has given a legitimate or invalid fair catch signal is disallowed from obstructing until the point when the kick has finished.

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