Subject to regulations prescribed by the Secretary of the military department concerned, an officer eligible for consideration by a promotion board convened under section 14101(a) of this title who is in the promotion zone or above the promotion zone, or who is to be considered by a vacancy promotion board, may send a written communication to the board calling attention to any matter concerning the officer which the officer considers important to the officer’s case. Any such communication shall be sent so as to arrive not later than 10 calendar days before the date on which the board convenes. The board shall give consideration to any timely communication under this section.