Interpretation ID: nht95-4.91

TYPE: INTERPRETATION-NHTSA

DATE: December 4, 1995

FROM: K.J. Sato -- President & CEO, Tekno - Info Corporation

TO: Kenneth O. Hardie -- Office of Rulemaking, NHTSA

TITLE: Request of Clarification for FMVSS No. 108 Requirements, S. 5.1.2

ATTACHMT: 2/1/96 letter from Samvel J. Dubbin to K.J. Sato (A44; Std. 108)

TEXT: This is to request you to clarify the interpretation of Federal Motor Vehicle Safety Standard (FMVSS) No. 108; Lamps, Reflective Devices, and associated equipment, paragraph S5.1.2.

Federal Register, September 5, 1995 Vol. 60, No. 171, page 46064 - 46067, announced the final rule to amend S5.1.2, effective from March 1, 1996. We would like to have your comments to clarify the requirement of S5.1.2(b).

Question on S5.1.2(b):

1) When plastics materials tested per SAE J576 JUL 91, and passed every criteria including the haze (and loss of surface luster) less than 30% (e.g. 10%) but failed to one of the appearance requirements (e.g. delamination) per J576 JUL 91, paragraph 4.2. 4 which says". . . shall not show physical changes affecting performance such as color bleeding, delamination, crazing, or cracking.", we need clarification whether or not the plastics materials are considered in compliance with S5.1.2(b) and can be used for lenses (other than those incorporating reflex reflectors). (We understand from S5.1.2(c) that the materials mentioned above cannot be used for reflex reflectors or lenses used in front of reflex reflectors since the materials failed to comply with the haze that exceeded 7%, and failed to comply with one of the the appearance requirements mentioned in S5.1.2(c)(("delamination")). But our question is asking if the materials can be used for lenses other than reflex reflectors or lenses used in front of, or incorporating, reflex reflectors). The reason for this question is that S5.1.2(b) does not mention those appearance requirements specifically but only mentions J576 JUL 91, although S5.1.2(c) specifically mentions those appearance requirements.

2) Since the final rule's S5.1.2(b) basically the same as the current S5.1.2(b), are we correct in assuming that your clarification of the above question 1) also applies to the current S5.1.2(b)?

I look forward to hearing from you at your earliest convenience.