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Interpretations to Part 393 — Parts and accessories necessary for safe operation

Question 1: May a system such as ‘‘driveline brakes’’ be used as an emergency brake provided it complies with the requirements of §393.52?

Guidance: Yes. CMVs which were not subject to the emergency brake requirements of FMVSS Nos. 105 or 121 may use ‘‘drive line brakes’’ provided those vehicles meet the requirements of §393.52.

['CMV Parts and Maintenance']
['Brakes']
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