Final answer:
The NCOER is mandatory for ranks of Sergeant (E-5) and above in the Army.
Step-by-step explanation:
In the Army, an NCOER (Non-Commissioned Officer Evaluation Report) is mandatory for individuals who hold the rank of Sergeant (E-5) and above. This includes ranks such as Staff Sergeant (E-6), Sergeant First Class (E-7), Master Sergeant (E-8), First Sergeant (E-8), and Sergeant Major (E-9). The NCOER is an important tool for evaluating and documenting the performance of NCOs in the Army.