Displaced thresholds at non-paved public airports shall be marked with at least four markers on each side of the landing area where the effective length commences. The threshold markers shall be no more than five feet apart, and placed on a center line 90 degrees to the runway heading.
Tenn. Comp. R. & Regs. 1680-01-02-.07
Authority: T.C.A. §42-233.