Which regulation requires passenger screening at airport checkpoints?

The regulation that mandates passenger screening at airport checkpoints is 49 CFR Part 1540. This part of the Code of Federal Regulations establishes security regulations for the transportation sector, particularly focusing on ensuring the safety and security of passengers and cargo in air transportation. It outlines the requirements for screening individuals before they access secure areas of the airport and before boarding an aircraft.

The significance of 49 CFR Part 1540 lies in its role in preventing unauthorized access and potential threats to aviation security. It delineates the responsibilities of airport operators and airline personnel in implementing screening procedures, including the use of screening technologies and personnel training to handle and process passengers effectively.

In contrast, the other regulations mentioned do not directly address passenger screening at airport checkpoints. Part 1500 pertains to general TSA policies, Part 1600 focuses on pipeline security, and Part 1700 deals with procedures for general aviation operations, none specifically outlining passenger screening requirements in the airport context. This distinction helps clarify why 49 CFR Part 1540 is the correct regulation concerning passenger screening.