Interpretation ID: aiam2926

Mr. Paul G. Scully, Chairman, SAE Lighting Committee, State Road 7, P.O. Box 766, Madison, IN 47250; Mr. Paul G. Scully
Chairman
SAE Lighting Committee
State Road 7
P.O. Box 766
Madison
IN 47250;

Dear Mr. Scully: This is in reply to your letter of December 18, 1978, asking for a interpretation of Federal Motor Vehicle Safety Standard No. 108.; The standard was recently amended to establish a ceiling of 60 inche from the roadway surface for the mounting height of rear side marker lamps. You have asked whether it is permissible to mount an additional side marker lamp at the upper rear corner of a trailer whose overall height exceeds 60 inches.; The answer is yes. Such a supplemental lamp would not appear to impai the effectiveness of lighting equipment required by Standard No. 108, within the meaning of the prohibition of S4.1.3 that you mentioned.; Sincerely, Joseph J. Levin, Jr., Chief Counsel