39. A subabdominal safety belt shall be capable of withstanding a breaking force of 26.7 kN and a combined subabdominal belt and shoulder belt shall be capable of withstanding a force of 22.2 kN and 17.8 kN respectively.
Subject to the second paragraph of section 42, the anchorage points of a subabdominal belt shall be capable of withstanding a force of 22.2 kN even when a shoulder-belt is attached to it. In such case, the anchorage points shall in addition be capable of withstanding a combined force of 26.8 kN applied simultaneously, half on the abdominal belt and half on the shoulder belt.