((a)) ** .—** At least 30 days before a promotion board is convened under to consider officers in a grade and competitive category for promotion to the next higher grade, the Secretary concerned shall either (1) notify in writing the officers eligible for consideration by the board for promotion regarding the convening of the board, or (2) issue a general written notice to the armed force concerned regarding the convening of the board.
((b)) ** .—** A notice under subsection (a) shall include the date on which the board is to convene and (except in the case of a vacancy promotion board) the name and date of rank of the junior officer, and of the senior officer, in the promotion zone as of the date of the notice.