The Officers' Reserve Corps In Peace
During peace the Secretary of War can order any Reserve Officer to duty
for instruction for a period not to exceed fifteen days in any one
calendar year. While so serving, an officer will receive the pay and
allowance of his grade in the Regular Army. This period of service may
be extended with the consent of the Reserve Officer. By thus extending
such periods of instruction a Reserve Officer may, at the conclusion
thereof, be examined for promotion to the next higher grade.