What documentation allows the use of CEPs in all Army aircraft?

The correct answer pertains to the airworthiness release from the U.S. Army Aeromedical Research Laboratory (USAARL). This documentation is necessary to verify that the airworthiness and operational requirements regarding the use of Controlled Environmental Protocols (CEPs) are met for all Army aircraft. It ensures that these protocols comply with safety and regulatory standards, ultimately allowing for standardized operations across different aircraft types.

The airworthiness release serves as an authoritative endorsement that confirms the systems and equipment installed, including those for CEPs, are suitable for use during flight operations. This documentation is critical in maintaining safety and compliance across various mission types undertaken by Army aircraft.

In contrast, the other options serve different purposes. A flight operations manual details the procedures and guidelines for the safe operation of aircraft, a safety inspection report evaluates the overall safety status of an aircraft, and a mission readiness certification affirms that an aircraft is prepared for specific missions but does not specifically address the use of CEPs across all platforms. None of these documents carry the same level of regulatory endorsement concerning the airworthiness and operational requirements for CEPs.