Final answer:
Per AR 600-20, an NCOER can include substantiated items from completed command or official investigations related to the individual's misconduct or other relevant behavior, as long as they are based on factual evidence.
Step-by-step explanation:
The AR 600-20 outlines the Army's command policy, which includes guidance on what can be mentioned on the Noncommissioned Officer Evaluation Report (NCOER). According to the Army's regulations, certain substantiated items from completed official investigations, such as a commander's or commandant's inquiry, an AR 15-6 investigation, an Equal Opportunity (EO) investigation, or investigations by official military or civil authorities, can be included in an NCOER. These items could pertain to findings of misconduct or other relevant behavior affecting the individual's performance and conduct. While the regulation does set out guidance for what can be included in an NCOER, it is essential that any mention of investigations and findings be factual, based on substantial evidence, and be properly concluded by the relevant investigative body.