Proposal to introduce a new temperature correction formula for the rolling sound emissions of tyres of classes C1 and C2, to remove the content of the now obsolete Annex 4 as well as all its references, to update references to standards, and to make editorial improvements for clarity and consistency across tyre regulations.

Proposal to reduce noise measurement variability, completing the amendment proposal adopted at the seventy-eighth session of the Working Party on Noise and Tyres (informal document GRBP-78-05 replacing ECE/TRANS/WP.29/GRBP/2023/19).

Proposal from Task Force on Tyre Abrasion (TFTA) to introduce test methods to measure tyre abrasion.

Proposal to complete the amendment proposal adopted at the 78th GRBP session (informal document GRBP-78-05 replacing ECE/TRANS/WP.29/GRBP/2023/19).

Proposal to improve the reproducibility of the snow grip test method by replacing the current reference tyres C3 SRTTs 19.5 and 22.5 with the new reference tyres C3 SRTTs 19.5 and 22.5 siped.

Proposal from the Measurement Uncertainties informal group for a Document for Reference providing a general approach on how to handle measurement uncertainties in UN Regulations (initially addressing UN Regulations Nos. 51 and 117).

Proposal to improve the reproducibility of the snow grip test method by replacing the current reference tyres C3 SRTTs 19.5 and 22.5 with the new reference tyres C3 SRTTs 19.5 and 22.5 siped.

Proposal for editorial improvements and updates to ISO and ASTM standards references and to align with Supplement 2 to the 04 series of amendments, including a new temperature correction formula for the rolling sound emissions of tyres of classes C1 and C2 and to remove the content of the now obsolete Annex 4 as well as all its references.

Proposal to allow the use of LT-marked tyres under certain conditions and weight limits with a rolling resistance greater than the current limits.