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Standard No. 209 - Seat Belt Assemblies - Passenger Cars, Multipurpose Passenger Vehicles, Trucks, and Buses (Effective 3-1-67) This standard specifies requirements for seat belt assemblies. The requirements apply to straps, webbing, or similar material, as well as to all necessary buckles and other fasteners and all hardware designed for installing the assembly in a motor vehicle, and to the installation, usage, and maintenance instructions for the assembly

Passenger Cars (Effective 1-1-68)
Lap or lap and shoulder seat belt assemblies for each designated seating position. Except in convertibles, lap and shoulder seat belt assemblies are required in each front outboard seating position.