RDASEP-Edit-05-03
RD-ASEP informal group draft status report to GRBP
Source(s)
Date
14 May 2026
Status
Subject
Meeting(s)

The IWG RD-ASEP informal group is developing a mandatory procedure for UN R51 after the monitoring phase. The Analysis Task Force determined vehicle databases and expectation models are suitable for RD-ASEP development. The Editing Task Force created a consolidated R51.04 draft submitted to GRBP-84. The revised R51.04 RD-ASEP includes manipulation and defeat device provisions, mandatory random testing for approval, revised control range, any acceleration position testing, vehicle speed range 0-100 km/hr, and vehicle performance criteria. A revised companion document GRB-68-03 is necessary.

UNECE server
Excerpts from session reports
GRB | Session 68 | 12-14 Sep 2018

8. The expert from IWG ASEP presented GRB-68-03 on interpreting the general ASEP provisions in the last sentence of paragraph 6.2.3. of the 03 series of amendments to UN Regulation No. 51. IWG ASEP was of the view that the developed definitions and specifications were adequate and valid enough to satisfy the intention of this sentence. Outside the specified control range, IWG ASEP deemed it difficult to provide viable specifications. IWG ASEP suggested that the provided interpretation be used as guidance for manufacturers, technical services, and type approval authorities for the practical application during type approval, conformity of production, and market surveillance.

9. GRB endorsed GRB-68-03 and requested the secretariat to publish it as a reference document under a special folder on the GRB website. GRB also recommended IWG ASEP to keep this document for further consideration within the ongoing revision process of ASEP.