Okla. Stat. tit. 47, § 47-12-206.1: Turn signal lamps

A. Every vehicle shall be equipped with turn signal lamps that

flash for the purpose of indicating the intention to turn either to

the left or to the right.

B. The flashing turn signal lamps required by this section:

1. Shall show to the front and rear of the vehicle;

2. On the front of the vehicle, shall be located on the same

level, as widely spaced laterally as practicable, at a height of not

more than seventy-two (72) inches nor less than fifteen (15) inches,

and when in use shall display a white or amber light, or any shade

of color between white and amber, visible from a distance of not

less than five hundred (500) feet to the front in normal sunlight;

and

3. On the rear of the vehicle, shall be located at the same

level and as widely spaced laterally as practicable, at a height of

not more than seventy-two (72) inches nor less than fifteen (15)

inches, and when in use shall display a red or amber light, or any

shade of color between red and amber, visible from a distance of not

less than five hundred (500) feet to the rear in normal sunlight.

C. A truck-tractor need not be equipped with turn signal lamps

mounted on the rear if the turn signals at the front are so

constructed and so located that they meet the requirements for

double-faced turn signals that meet the standards of the Society of

Automotive Engineers (SAE).