((a)) ** .—** Except as provided in subsection (b), a Reserve officer is eligible for consideration for promotion and for promotion under this subchapter if that officer is in an active status.
((b)) ** .—** A Reserve officer who has been considered but not recommended for retention in an active status by a board convened under subsection 3752(a) of this title is not eligible for consideration for promotion.
((c))
((1)) ** .—** The Commandant may provide that an officer may, upon the officer’s request and with the approval of the Commandant, be excluded from consideration by a selection board convened under to consider officers for promotion to the next higher grade.
((2)) ** .—** The Commandant shall approve a request under paragraph (1) only if—
((A)) the basis for the request is to allow an officer to complete a broadening assignment, advanced education, another assignment of significant value to the Coast Guard, a career progression requirement delayed by the assignment or education, or a qualifying personal or professional circumstance, as determined by the Commandant;
((B)) the Commandant determines the exclusion from consideration is in the best interest of the Coast Guard; and
((C)) the officer has not previously failed of selection for promotion to the grade for which the officer requests the exclusion from consideration.