Which health-related requirement must applicants meet to become certified security officers?

To become a certified security officer, applicants must demonstrate that they are not addicted to drugs or alcohol. This requirement is crucial because security officers are often placed in situations that involve making quick decisions under pressure, maintaining safety, and upholding the law. A history of addiction could impair judgment, decrease reliability, and increase the risk of compromising the safety of others. Therefore, it is vital for applicants to show that they are free from substance dependence to ensure they can effectively perform their duties without risk to themselves or the public.

In the context of the other choices, the absence of allergies is not a standard requirement for certification, as allergies vary significantly among individuals and do not necessarily impact an officer's ability to perform their job duties. Passing a psychological evaluation, while important for assessing mental fitness, may not specifically focus on addiction issues, which is a more critical concern. Additionally, while physical fitness can be beneficial for security officers, there is no standardized requirement mandating that they must be able to run a specific distance like 5 miles.