What items are security personnel prohibited from using while on duty?

The correct answer focuses on the prohibition of firearms and restraining devices while security personnel are on duty. This is important because the primary role of security personnel is to ensure safety and security without escalating situations through the use of weapons or excessive force. Firearms can introduce unnecessary risks and potentially lead to tragic outcomes, particularly since security personnel are not typically trained to the same level as law enforcement regarding their use.

Restraining devices, like handcuffs, can also lead to legal implications if used improperly. Their use may result in incidents involving claims of excessive force, which can tarnish both the reputation of the security personnel and the organization they represent.

The mention of specialized weapons, pepper spray, or mobile devices in other options does not fully encapsulate the comprehensive risks and legal liabilities associated with firearms and restraining devices, highlighting the emphasis on ensuring a safe environment while minimizing risks. Hence, the prohibition of these items aligns with best practices in the security industry to promote peace and effective conflict resolution without the use of potentially dangerous tools.