Motor Vehicle Restraint Systems and Booster Seats Safety Regulations — 315
Dynamic testing 315 (1) An infant restraint system that is subjected to a dynamic test in accordance with section 4 of Test Method 213.1 must, if the adjustment position of each component of the restraint system is in accordance with the manufacturer’s instructions, (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, except that, if the restraint system has a means of automatically repositioning the seating surface to allow the anthropomorphic test device to move from a reclined position to a more upright position and back to a reclined position during the test, the seating surface does not have to remain in the same adjustment position during the test as it was in immediately before the test began; (c) 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; (d) limit the resultant acceleration of the centre of gravity of the head of the anthropomorphic test device during the movement of the head towards the front of the vehicle 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 striking its head; (e) retain the torso of the anthropomorphic test device within the restraint system, and not allow any portion of the target points on either side of the device’s head, located on the transverse axis passing through the centre of mass of the device’s head and perpendicular to the head’s midsagittal plane, to pass at any time, during or immediately after the test, either through the transverse orthogonal planes formed by the extension of the seat back frontal surface plane of the restraint system and by the plane that passes through the uppermost point of the restraint system, as shown in Figure 7 of Schedule 7, or through the vertical transverse plane passing through point X on the standard seat assembly, as shown in Figure 8 of Schedule 7; (f) not allow the angle between the vertical and the back and head support surface, measured 240 mm above the seating surface, to be more than 70° at any time during the test; (g) limit the movement of the head of the anthropomorphic test device towards the rear of the restraint system by means of a continuous seat back that is an integral part of the restraint system; and (h) limit the rotation of the head of the anthropomorphic test device towards the rear of the restraint system, in its midsagittal plane, by means of a continuous seat back that is an integral part of the restraint system, 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 prior to the test. Dynamic testing — levelling device (2) An infant restraint system that is subjected to a dynamic test in accordance with section 4 of Test Method 213.1 must conform to the requirements of paragraphs (1)(a) and (b) if the restraint system is equipped with a levelling device and the adjustment position of each component of the restraint system, except the levelling device, is in accordance with the manufacturer’s instructions. Continuous seat back (3) The continuous seat back referred to in paragraphs (1)(g) and (h) must (a) have a height of at least 500 mm; (b) have a width of at least 200 mm, measured in the horizontal plane at the height specified in paragraph (a); and (c) not impose any loads on the top of the head of the anthropomorphic test device during the dynamic test referred to in subsection (1). Measurement of height — paragraph (3)(a) (4) The height referred to in paragraph (3)(a) must be measured in