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(13) "Air National Guard of the United States" means the reserve component of the Air Force all of whose members are members of the Air National Guard. (14) "Officer" means commissioned or warrant officer. (15) "Commissioned officer" includes a commissioned warrant officer. (16) "Warrant officer" means a person who holds a commission or warrant in a warrant officer grade. (lY) "Enlisted member" means a person in an enlisted grade. (18) "Grade" means a step or degree, in a graduated scale of office or military rank, that is established and designated as a grade by law or regulation. (19) "Rank" means the order of precedence among members of the armed forces. (20) "Rating" means the name (such as "boatswain's mate") prescribed for members of an armed force in an occupational field. "Rate" means the name (such as "chief boatswain's mate") prescribed for members in the same rating or other category who are in the same grade (such as chief petty officer or seaman apprentice). (21) "Authorized strength" means the largest number of members authorized to be in an armed force, a component, a branch, a grade, or any other category of the armed forces. (22) "Active duty" means full-time duty in the active military service of the United States. I t includes duty on the active list, full-time training duty, annual training duty, and attendance, while in the active military service, at a school designated as a service school by law or by the Secretary of the military department concerned. (23) "Active duty for a period of more than 30 days" means active duty under a call or order that does not specify a period of 30 days or less. (24) "Active service" means service on active duty. (26) "Supplies" includes material, equipment, and stores of all kinds. (27) "Pay" includes basic pay, special pay, retainer pay, incentive pay, retired pay, and equivalent pay, but does not include allowances. (28) "Shall" is used in an imperative sense. (29) "May" is used in a permissive sense. The words "no person may..." mean that no person is required, authorized, or permitted to do the act prescribed. (30) "Includes" means "includes but is not limited to". (31) "Inactive-duty training" means— (A) duty prescribed for Reserves by the Secretary concerned under section 301 of title 37 or any other provision of law; and (B) special additional duties authorized for Reserves by an authority designated by the Secretary concerned and performed by them on a voluntary basis in connection with the prescribed training or maintenance activities of the units to which they are assigned. I t includes those duties when performed by Reserves in their status as members of the National Guard.
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