What document includes a record of all NJP hearings conducted by a command?

The correct choice is the Unit Punishment Book (UPB). This document serves as an official record that details all Non-Judicial Punishment (NJP) hearings conducted by a command. It is critical for maintaining a comprehensive log of actions taken under NJP, ensuring accountability, and providing a reference for future disciplinary matters.

The UPB includes important information such as the date of the hearing, the individuals involved, and the nature of the allegations and punishments. This record is vital for statistical analysis and compliance with military regulations regarding conduct and disciplinary actions.

Other options, while related to disciplinary records, do not serve the same purpose. The NJP Record typically summarizes the outcome of specific cases but does not provide a continuous, comprehensive log. The Individual Punishment Summary may capture data on punishments but lacks the thoroughness of the UPB. Lastly, a Command Background Check is focused on evaluating an individual's personal history and background information rather than maintaining a record of NJP hearings.