Air National Guard of the United States, 13,573. (4) For the Air Force Reserve, 8,848. 414. Maximum number of reserve personnel authorized to be on active duty for operational support During fiscal year 2020, the maximum number of members of the reserve components of the Armed Forces who may be serving at any time on full-time operational support duty under section 115(b) of title 10, United States Code, is the following: (1) The Army National Guard of the United States, 17,000. (2) The Army Reserve, 13,000. (3) The Navy Reserve, 6,200. (4) The Marine Corps Reserve, 3,000. (5) The Air National Guard of the United States, 16,000. (6) The Air Force Reserve, 14,000. 415. Authorized strengths for Marine Corps Reserves on active duty (a) Officers Section 12011(a)(1) of title 10, United States Code, is amended by striking those parts of the table pertaining to the Marine Corps Reserve and inserting the following: Marine Corps Reserve: Major Lieutenant Colonel Colonel 2,400 143 105 34 2,500 149 109 35 2,600 155 113 36 2,700 161 118 37 2,800 167 122 39 2,900 173 126 41 3,000 179 130 42 . (b) Senior enlisted members Section 12012(a) of title 10, United States Code, is amended by striking those parts of the table pertaining to the Marine Corps Reserve and inserting the following: Marine Corps Reserve: E–8 E–9 2,400 106 24 2,500 112 25 2,600 116 26 2,700 121 27 2,800 125 28 2,900 130 29 3,000 134 30 . 416. Authorized strength: exclusion of certain reserve component general and flag officers on active duty Section 526a of title 10, United States Code, is amended— (1) in subsection (b), by adding at the end the following new paragraph: (3) Certain reserve component general and flag officers on active duty (A) The Chairman of the Joint Chiefs of Staff may designate up to 15 general and flag officer positions in the unified and specified combatant commands, and up to three general and flag officer positions on the Joint Staff, as positions to be held only by reserve component officers who are in a general or flag officer grade