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Interpretation ID: nht78-2.47

DATE: 01/10/78

FROM: AUTHOR UNAVAILABLE; J. J. Levin, Jr.; NHTSA

TO: Briskin Manufacturing Company

TITLE: FMVSS INTERPRETATION

TEXT: I would like to advise Briskin Manufacturing Company as a producer of air reservoirs for use on vehicles that comply with Standard No. 121, Air Brake Systems, that the National Highway Traffic Safety Administration (NHTSA) has decided to withdraw its December 14, 1977, interpretation of the requirement that reservoirs "withstand" internal hydrostatic pressure (copy of interpretation enclosed).

While the NHTSA simply intended to clarify its existing interpretation of the requirements, information brought to the agency's attention indicates that the revised interpretation would have the unintended effect of increasing the stringency of the requirements. Any such upgrading of the integrity requirements for air reservoirs would be preceded by notice and opportunity for public comment.

The agency expects to publish notice that its interpretation is withdrawn in the Federal Register in the near future.