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Interpretation ID: nht71-1.14

DATE: APRIL 16, 1971

FROM: AUTHOR UNAVAILABLE; E. T. Driver; NHTSA

TO: Western Safety Devices Company

TITLE: FMVSS INTERPRETATION

TEXT: In response to your letter of March 10, 1971, to Mr. Douglas W. Toms, Administrator, National Highway Traffic Safety Administration, concerning Federal Motor Vehicle Safety Standard No. 121, Air Brake Systems; Truck, Buses and Trailers, the following information is offered.

1. Standard No. 121 applies only to new vehicles manufactured on or after January 1, 1973.

2. Federal Motor Vehicle Safety Standard No. 121 does not preclude the use of a dashboard-mounted control for the tractor protection valve.

3. Standardization of a dashboard-mounted control valve is not contemplated at the present time.

4. A petition requesting reconsideration of the requirements for a parking brake control valve in S5.4.6 has been received and is being considered at the present time. The decision in response to this and other petitions will be published in the Federal Register in the near future.