(a) To be eligible for original enlistment in the National Guard,
a person must be at least 17 years of age and under 45, or under 64
years of age and a former member of the Regular Army, Regular Navy,
Regular Air Force, or Regular Marine Corps. To be eligible for
reenlistment, a person must be under 64 years of age.
(b) To be eligible for appointment as an officer of the National
Guard, a person must -
(1) be a citizen of the United States; and
(2) be at least 18 years of age and under 64.
Thank you but that along with this sentence:”(a)The militia of the United States consists of all able-bodied males at least 17 years of age and, except as provided in section 313 of title 32, under 45 years of age who are, or who have made a declaration of intention to become, citizens of the United States and of female citizens of the United States who are members of the National Guard”, make for some confusing language.