Final answer:
When a passenger notifies the certificate holder prior to checking baggage that an unloaded weapon is in the baggage, regulations require certain actions to be taken to ensure the safe handling and transportation of the weapon.
Step-by-step explanation:
When a passenger notifies the certificate holder prior to checking baggage that an unloaded weapon is in the baggage, regulations require certain actions to be taken. The certificate holder must follow specific procedures to ensure the safe handling and transportation of the weapon. This may include verifying the passenger's identity, checking the weapon to ensure it is actually unloaded, and properly securing it to prevent any potential dangers.