Final answer:
Commanding Officers and Officers in Charge must review a Service member's official military personnel file within 30 days of their permanent assignment to maintain accountability and integrity within the military.
Step-by-step explanation:
Commanders, Commanding Officers (COs), and Officers in Charge (OIC) are required to review a Service member's official military personnel file, which includes the designated field code (91) or NAVPERS 1070/887 Sex Offense Accountability Record. This review must take place within 30 days of the permanent assignment of a Service member. It's an essential part of maintaining accountability and ensuring the integrity of the armed forces.