What must security personnel not use while working unless trained for specific circumstances?

Security personnel are often required to handle various situations that may necessitate the use of specific equipment. In this context, handcuffs and restraining devices fall into a category where proper training is critical. These tools can be used to control individuals in certain situations, but if not used correctly, they can lead to injury or legal complications. Therefore, personnel must receive specialized training to understand the correct application, the legal ramifications, and the safety protocols in their use.

Using handcuffs and restraining devices without the appropriate training can pose significant risks, both to the individual being restrained and to the security personnel. This underscores the importance of training in ensuring that security personnel can perform their duties effectively and safely, adhering to laws and regulations concerning the use of force and restraint.

On the other hand, while firearms and electronic devices are also regulated, not all security roles require their use. Rope and zip ties may not have the same stringent training requirements associated with them as handcuffs do, particularly in most basic security roles. Thus, the emphasis on the need for specific training to use handcuffs and restraining devices makes this option the correct choice.