What must all security guards carry while on duty?

All security guards are required to carry a valid security guard registration card while on duty because this card serves as proof of their qualifications and authorization to work in that capacity. The registration card typically verifies that the individual has completed the necessary training, passed background checks, and is officially recognized by the appropriate licensing authority. This requirement is crucial for maintaining the integrity and professionalism of the security industry, ensuring that guards are properly vetted and qualified to handle their responsibilities.

While items like flashlights, personal cell phones, or whistles can be useful tools for security personnel in various situations, they are not mandatory items that every guard must carry. Each of these items may be beneficial depending on the specific duties of the guard or the environment they are working in, but carrying the registration card is a legal requirement that confirms a guard's legitimacy in their role.