This part updates policies and responsibilities for basic entrance qualification standards for enlistment, appointment, and induction into the Armed Forces, and delegates the authority to specify certain standards to the secretaries of the military departments. It establishes the age, citizenship, education, aptitude, physical fitness, dependency status, moral character, and other disqualifying conditions that are causes for rejection from military service. Other standards may be prescribed in the event of mobilization or national emergency. This part sets standards designed to ensure that individuals under consideration for enlistment, appointment, and/or induction are able to perform military duties successfully, and to select those who are the most trainable and adaptable to military service life.