Which flight planning document should you refer to for specific HAMAT requirement?

For specific HAMAT (Hazardous Materials Transportation) requirements, you should refer to the airline's operations manual or the relevant flight planning guide provided by the airline. Additionally, the International Air Transport Association (IATA) Dangerous Goods Regulations (DGR) can provide detailed information on the regulations and requirements for transporting hazardous materials. Always ensure to check the latest updates and compliance standards for the specific route and aircraft type.