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T.2.5.1 The Lap Belts must pass around the pelvic area below the Anterior Superior Iliac Spines (the hip bones).
T.2.5.2 The Lap Belts must not be routed over the sides of the seat. The Belts must come through the seat at the bottom of the sides of the seat and continue in a straight line to the anchorage point.
T.2.5.3 The seat must be rolled or grommeted where the Belts or Harness pass through a hole in the seat
T.2.5.4 In side view, the Lap Belt must be capable of pivoting freely by using a shouldered bolt or an eye bolt attachment.
T.2.5.5 Lap Belts must not be mounted by wrapping them around frame tubes.
T.2.5.6 With an Upright Driving Position: (see figure below)
a. The Lap Belt Side View Angle must be between 45° and 65° to the horizontal.
b. The centerline of the Lap Belt at the seat bottom should be between 0 – 75 mm forward of the seat back to seat bottom junction.
T.2.5.8 Any bolt used to attach a Lap Belt, directly to the chassis or to an intermediate bracket, is a
Critical Fasteners, see T.8.2, with a minimum diameter that is the smaller of:
The bolt diameter specified by the manufacturer
10 mm or 3/8”