You can go through INSARAG Guidelines 2020 (Annexes): https://www.insarag.org/guidelines
Note: Some of annexes, checklists and forms from the previous INSARAG Guidelines (2015) have been additionally moved to the Guidance Notes section of www.insarag.org. For more information on the changes from the 2015 Guidelines, refer to the Table of Changes under Annex A.