What must an armed guard have to legally carry a firearm according to the standards?

In order to legally carry a firearm as an armed guard, having a valid guard card and a firearm permit is essential. The guard card certifies that the individual has met the requirements and training to function as a security officer, while the firearm permit indicates that they have undergone specific training and have been authorized to possess and carry a firearm in their capacity as a guard. This combination of certifications ensures that the guard is not only trained in the use of firearms but also adheres to the legal standards set forth by the governing authorities in the security industry.

The other options do not encompass the necessary legal requirements. A firearms training certificate alone does not authorize carrying a firearm in a security capacity without the proper permits. A state-issued security officer badge is often a requirement for identification purposes, but it does not imply permission to carry a firearm. Similarly, while approval from a private security firm may be part of employment, it does not substitute for the legal requirements of obtaining both a guard card and a firearm permit.