Based on WP.29/2025/140 as adopted during the 197th WP.29 session (10-14
Nov 2025).
WP.29/2025/140
Proposal improve consistency in the bedding/burnishing procedure and to align the Communication Form with that of other UN Regulations and, pursuant to changing the application of the Unique Identifier (UI) under the 1958 Agreement, to the prohibition on use of the UI for replacement brake components under UN R90 due to the decision to change the default application of the UI to prohibited unless specified.
Entry into force as of 4 Jun 2026