grade structure vacancies promotion to captain, major, and lieutenant colonel

grade structure vacancies promotion to captain, major, and lieutenant colonel Sec. 309. (a) When the Secretary determines that there are existing or anticipated vacancies within the numbers authorized pursuant to section 307 (b) (2) (i) or (ii) for the grades of captain, major, or lieutenant colonel, he may appoint and convene one or more selection boards to consider and recommend nonunit officers of the Army Reserve for promotion to fill the vacancies. The Secretary shall prescribe for each zone of consideration list established under section 314 (a) the minimum promotion service an officer of the appropriate branch must have to be placed thereon, and shall require that the nonunit officers with the prescribed promotion service and the total years of service required by section 315 (b) be placed thereon. He shall also prescribe the number of officers to be recommended for promotion from each list. (b) Upon attaining the total years of service required by section 315 (a), an officer recommended for promotion under this section may be promoted at any time to fill a vacancy, but it is not mandatory that the authorized number in these grades be maintained. (c) Women’s Medical Specialist Corps or Army Nurse Corps Reserve officers in the grade of captain or higher and Women’s Army Corps Reserve officers in the grade of major may not be considered for promotion under this section.