IATA and ICAO have released addenda to their 2021 Dangerous Goods Regulations. The UN released a Corrigendum to its UNADR Dangerous Goods Regulations in December 2020. All are effective from the 1st January 2021.
The PDFs can all be downloaded from the following links:
Addendum to IATA’s DGR 62nd Edition: https://www.labeline.com/wp-content/uploads/2020/08/DGR62-Addendum1-EN-01-January-2021.pdf
Addendum to ICAO’s Technical Instructions 2021-22 Edition: https://www.labeline.com/wp-content/uploads/2020/08/9284_2021_2022_add_01_en.pdf
UNADR Addendum to the 2021 Edition: https://www.labeline.com/wp-content/uploads/2020/12/ECE-TRANS-300-Corr2f.pdf