Final answer:
The senior rater in the military must retain copies of reports for a minimum of 5 years to comply with Army regulations.
Step-by-step explanation:
The senior rater in the military must retain copies of reports for a specific period of time. According to Army Regulation 623-3, the senior rater must retain copies of completed officer evaluation reports (OERs) for a minimum of 5 years.
This requirement ensures that there is a record of the officer's performance and can be used for various purposes such as promotions, assignments, and future evaluations. By keeping these reports, the senior rater can refer to them when necessary and provide an accurate assessment of the officer's performance.
Therefore, the senior rater must retain copies of reports for at least 5 years to comply with the regulations and maintain a comprehensive record of the officer's evaluations.