AR 135-175 governs policies, criteria, and procedures for the separation of Reserve officers of the Army.
View AR 135-175 on armypubs.army.mil
It addresses dropping Reserve officers from the Army rolls, discharge or removal from active status, vacation and revocation of appointments, and resignations. It sets criteria and procedures for these actions, including automatic appointment vacation and medical-fitness resignation eligibility.
Applies to: The provisions of this chapter are applicable to officers of the USAR, including those who become members thereof by reason of withdrawal of federal recognition from the ARNGUS for reasons outlined in paragraph 3 3.
Absence without proper authority from scheduled unit training for at least 3 months. (paragraph 3)
Discharge of an officer from their appointment as a Reserve of the Army also terminates membership in the USAR. (paragraph 4-1)
The appointment as a Reserve officer of the Army is vacated effective the date immediately preceding the date the officer enlists or executes oath of office for appointment in the new military status. (paragraph 5-1)
Administrative action is not required to accomplish automatic vacation of appointment. (paragraph 5-1)
When it is found that a Reserve commissioned officer or WO was appointed in error, the appointment will be revoked. (paragraph 5-3)