14 C.F.R. § 29.1413 Safety belts: passenger warning device.
Title 14 - Aeronautics and Space
(a) If there are means to indicate to the passengers when safety belts should be fastened, they must be installed to be operated from either pilot seat. (b) Each safety belt must be equipped with a metal to metal latching device. (Secs. 313, 314, and 601 through 610 of the Federal Aviation Act of 1958 (49 U.S.C. 1354, 1355, and 1421 through 1430) and sec. 6(c), Dept. of Transportation Act (49 U.S.C. 1655(c))) [Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as amended by Amdt. 29–16 43 FR 46233, Oct. 5, 1978]
Title 14: Aeronautics and Space
PART 29—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT
Subpart F—Equipment
Safety Equipment
§ 29.1413 Safety belts: passenger warning device.

