Why must commercial vendor procedures undergo a TERPS review prior to usage according to AFMAN 11-217 V3?

The correct answer focuses on the necessity for commercial vendor procedures to undergo a TERPS (Terminal Instrument Procedures) review due to their potential lack of flight checks and standards. This is crucial because procedures created by commercial vendors may not adhere to the stringent requirements established by the FAA and associated governing bodies. Regular TERPS reviews ensure that these procedures meet safety and operational standards, which is essential for maintaining the integrity of aviation operations.

Without proper flight checks and adherence to established standards, there can be discrepancies in the procedures, which may lead to safety issues in real-world flying scenarios. TERPS reviews serve as a safeguard to confirm that all published procedures are operationally sound and safe for use, especially when they deviate from the norms established for military or other standardized operations.