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Rule 23 Brief of Amicus Curiae.

A brief of amicus curiae may be filed only if accompanied by written consent of all parties or by leave of the Supreme Court. The brief may be filed conditionally with the motion for leave to file it, which shall identify the interest of the movant and shall state the reasons why a brief of amicus curiae is desirable. Any amicus curiae shall file its brief within the time allowed the party whose position the amicus will support, unless the Supreme Court for cause shown grants leave for later filing, in which event it shall specify within what period an opposing party may answer. A motion of amicus curiae to participate in the oral argument will be granted only for extraordinary reasons.