WP.29/2019/55 | UN R138: Proposal for Supplement 1 to the 01 series of amendments Proposal to<ol class="alpha"><li>exempt hybrid vehicles that do not provide valid test results (e.g., internal combustion engine active under test conditions)</li><li>clarify the text concerning permissible AVAS operating conditions</li>to differentiate indoor and outdoor facility requirements (e.g., weather station requirement) and</li><li>update flowcharts in Annex 3 in line with text.</li><li>add a footnote to the scope to exempt electrified vehicles where the internal combustion engine (ICE) operates under the test conditions</li><li>clarify the intention of paragraph 6.2.:<ul><li>that AVAS may be operational outside the specified speed ranges (e.g., in the USA where the speed range extends to 30 km/h),</li><li>align maximum sound with UN R51.03 ASEP, and</li><li>explicitly specify that the AVAS may function even when the ICE is running</li></ul><li>clarify under paragraph 6.2.6. that a manufacturer may install an attenuation to enable the system to operate at different sound levels</li><li>split and clarify indoor and outdoor testing specifications under Annex 3 paragraph 2.2. to account for different needs such as a weather station</li><li>amend the flowcharts in the Annex 3 Appendix to better reflect the regulation text</li><li>align the transitional provisions in the 01 series of amendments with the format introduced following Revision 3 of the 1958 Agreement.</li></ol>