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Interpretation ID: nht71-5.1

DATE: 11/17/71

FROM: AUTHOR UNAVAILABLE; J. W. Carson for E. T. Driver; NHTSA

TO: Ward School Bus Mfg., Inc.

TITLE: FMVSS INTERPRETATION

TEXT: Your letter of October 28, 1971, to Mr. Stan Haranski, Truck Body and Equipment Association, Inc., concerning switching arrangements for school bus red signal lamps, has been forwarded to this Office for reply.

Paragraph S4.1.4(a) of Federal Motor Vehicle Safety Standard No. 108 requires that the four red signal lamps be controlled by a manually actuated switch. A two-way switch, whereby all four lamps are activated when the switch is in one position, and the two rear lamps only are activated when the switch is in the opposite position, would not be in violation of this requirement of Standard No. 108.