Requires the airline to comply with US legislation and submit a working crisis plan to the US National Transport Safety Board for approval. The plan must be fully resourced before entry approval will be granted.
htts://www.ntsb.gov/tda/TDADocuments/49USC41313.pdf
You can use British red cross, IATA, ICAO, NTSP website for references
FEDERAL FAMILY ASSISTANCE PLAN FOR AVIATION DISASTERS