; and (B) may, by regulation, provide for the exclusion from consideration for promotion by a selection board of an officer otherwise eligible to be considered by the board who has an established date for removal from the Space Force officer list that is not more than 90 days after the date on which the board is to be convened. (b) Certain officers not to be considered A selection board convened under section 20211 of this title may not consider for promotion to the next higher grade any of the following officers: (1) An officer whose name is on a promotion list for that grade as a result of recommendation for promotion to that grade by an earlier selection board convened under that section or section 20151 of this title, under section 14101 or 14502 of this title, or under chapter 36 of this title. (2) An officer who is recommended for promotion to that grade in the report of an earlier selection board convened under a provision referred to in paragraph (1), in the case of such a report that has not yet been approved by the President. (3) An officer who has been nominated by the President for promotion to that grade under any other provision of law, if that nomination is pending before the Senate. (4) An officer in the grade of first lieutenant who is on an approved all-fully-qualified-officers list under section 20238(a)(4) of this title. (5) An officer excluded under 20232 of this title. (6) An officer who has failed of promotion to a higher grade the maximum number of times specified for opportunities for promotion for such grade within the competitive category concerned pursuant to section 20234 of this title. (c) Certain colonels (1) Authority to preclude from consideration The Secretary of Defense may authorize the Secretary of the Air Force to preclude from consideration by selection boards for promotion to the grade of brigadier general, officers in the grade of colonel who— (A) have been considered and not selected for promotion to the grade of brigadier general or by at least two selection boards