Motor Vehicle Safety Regulations — 213.4
ance with paragraph (a): (d) when tested in accordance with S5.1(b) of TSD 209 after being subjected to light exposure as specified in S5.1(e) of TSD 209, have a breaking strength of at least 60% of the breaking strength determined in accordance with paragraph (a); (e) when tested in accordance with S5.1(b) of TSD 209 after being subjected to micro-organism exposure as specified in S5.1(f) of TSD 209, have a breaking strength of at least 85% of the breaking strength determined in accordance with paragraph (a); and ( f ) if contactable by the torso of an anthropomorphic test device when the restraint system is tested in accordance with section 5 of Test Method 213.4, have a width of not less than 38 mm when measured as specified in S5.1(a) of TSD 209. (9) Every built-in restraint system and built-in booster seat shall provide, for the support of a person’s back, a continuous surface that is flat or concave and has an area of not less than 54 800 mm 2 . (10) A built-in restraint system shall not have any surface directly in front of a person, unless the surface is designed to limit the forward movement of the person. (11) Every horizontal cross-section of a surface of a built-in restraint system that is designed to limit the forward movement of a person shall be flat or concave, and every vertical longitudinal cross-section of that surface shall be flat or convex with a radius of curvature of the underlying structure of not less than 50 mm. (12) Any rigid structural component underlying a contactable surface of a built-in restraint system or built-in booster seat shall not have (a) a protrusion, with any padding or flexible overlay material removed, of more than 9.5 mm; or (b) an exposed edge with a radius of less than 6.4 mm. (13) Every built-in restraint system and built-in booster seat, when tested in accordance with section 5 of Test Method 213.4, shall, in any of the positions that the restraint system, booster seat or vehicle seat can be used while the vehicle is in motion, (a) exhibit no complete separation of any load-bearing structural element and no partial separation exposing a surface with (i) a protrusion of more than 9.5 mm, or (ii) a radius of less than 6.4 mm; (b) remain in the same adjustment position during the test as it was in immediately before the test began; (c) limit the movement of the head of the anthropomorphic test device toward the rear of the restraint system or booster seat by means of a continuous seat back that is an integral part of the restraint system or booster seat; (d) limit the rotation of the head of the anthropomorphic test device toward the rear of the restraint system or booster seat, in the head’s midsagittal plane, by means of a continuous seat back that is an integral part of the restraint system or booster seat, so that the angle between the head and the torso is at no time during the test more than 45° as compared to the angle between the head and the torso immediately before the test began; (e) except in the case of a restraint system or booster seat tested with the anthropomorphic test device specified in subpart O or S, part 572, chapter V, Title 49 of the Code of Federal Regulations of the United States (revised as of October 1, 2012), limit the resultant acceleration at the location of the accelerometer mounted in the upper thorax of the anthropomorphic test device to not more than 60 g, except for intervals of not more than 3 ms; (f) except in the case of a restraint system or booster seat tested with the anthropomorphic test device specified in subpart O or S, part 572, chapter V, Title 49 of the Code of Federal Regulations of the United States (revised as of October 1, 2012), limit the resultant acceleration of the centre of gravity of the head of the anthropomorphic test device to not more than 80 g, except for intervals of not more than 3 ms, unless it is established that any resultant acceleration above 80 g is caused by another part of the anthropomorphic test device s