What is the purpose of a hazmat security plan, and who must have one?

Answer: B — To prevent theft or diversion and outline security measures; required for certain hazmat carriers under 49 CFR 172.800

A hazmat security plan is a formal document that shows how a company will keep hazardous materials shipments safe from theft, diversion, and tampering. It explains the security measures in place—like access controls, employee screening and training, chain-of-custody procedures, secure storage, and how to recognize and respond to suspicious activity—and it specifies who is responsible for each task. This plan is required for hazmat carriers that handle or transport certain quantities or types of hazardous materials under 49 CFR 172.800. In other words, not every hazmat operation needs a plan, but those that meet the regulatory threshold must have a security plan on file and keep it up to date. The goal is to protect the public, the shipments, and the company by having clear, enforceable security procedures.