Taken from the Federal Motor Vehicle Safety Standard 108
[Code of Federal Regulations]
[Title 49, Volume 5]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR571.108]
[Page 239-313]
TITLE 49--TRANSPORTATION CHAPTER V
--NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
PART 571_FEDERAL MOTOR VEHICLE SAFETY STANDARDS
--Table of Contents
Subpart B_Federal Motor Vehicle Safety Standards Sec. 571.108
Standard No. 108; Lamps, reflective devices, and associated equipment.
Table III on page 312 and 313 (Required Motor Vehicle Lighting Equipment [All Passenger Cars and Motorcycles, and Multipurpose Passenger Vehicles, Trucks, Buses and Trailers of Less Than 80 (2032) Inches (mm) Overall
At or near the front--1 amber on each side of the vertical centerline at the same height, and having a minimum horizontal separation distance (centerline of lamps) of 16 inches. Minimum edge to edge separation distance between lamp and headlamp is 4 inches.
At or near the rear--1 red or amber on each side of the vertical centerline,at the same height and having a minimum horizontal separation distance (centerline to centerline of lamps) of 9 inches. Minimum edge to edge separation distance between lamp and tail or stop lamp is 4-inches, when a single stop and taillamp is installed on the vertical centerline and the turn signal lamps are red..
Them's the rules for motorcycle turnsignals according to the gubment, at least the latest ones as given to me by the state of GA's DMV inspection board. I edited out the ones for anything else covered in this section.
Here's a link to the document if you want to look for yourself, the tables are at the end of the doc.
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