9 Sep 2021	Agenda for the 27th Worn Tyres working group session	WT-27-01	2021-09-09
10 Sep 2021	Worn Tyres working group draft status report	WT-27-02	2021-09-10
10 Sep 2021	UN R117: Amendments to document GRBP/2021/12	WT-27-03	2021-09-10
11 Sep 2021	Attendance list from the 27th Worn Tyres working group session	WT-27-04	2021-09-11
11 Sep 2021	Minutes of the 27th Worn Tyres working group session	WT-27-05	2021-09-11
11 Sep 2021	Worn Tyres working group status report to GRBP	WT-27-06	2021-09-11
11 Sep 2021	UN R117: Proposal for amendments to GRBP/2021/12	WT-27-07	2021-09-11