4.DEMONSTRATION REQUIREMENTSU.K.
4.1.The demonstration requirements shall be those set out in Section 6 of Annex 9B to UN/ECE Regulation No 49 and those described in Section 4 of this Annex.U.K.
4.2.In addition to the point 4.1 the manufacturer may use the requirements as set out in Appendix 2 to demonstrate the performance monitoring.U.K.
Approval authorities may approve a manufacturer’s use of a type of performance monitoring technique other than the one referred to in Appendix 2. The chosen type of monitoring shall be demonstrated by the manufacturer by a robust technical case based upon the design characteristics, or by presentation of test results, or by reference to previous approvals, or by some other acceptable method, to be at least as robust, timely and efficient as the ones mentioned in Appendix 2.