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49 CFR Part 393

Parts and Accessories Necessary for Safe Operation.

49 CFR Part 571.103 (FMVSS 103)

Windscreen Defrost and Defog Systems.

49 CFR Part 571.104 (FMVSS 104)

Windscreen Wash and Wipe Systems.

49 CFR Part 571.217 (FMVSS 217)

Bus Emergency Exits and Window Retention/Release.

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