Which requirement must a security department meet to employ a commissioned security officer?

To employ a commissioned security officer, a security department must hold a letter of authority. This letter serves as official documentation that allows the security department to operate with the power to make arrests and enforce the law at specific locations and under defined circumstances. The requirement ensures that only those security companies that meet specific state regulatory standards can employ commissioned officers, ultimately enhancing the professionalism and accountability of security services provided to the community.

Holding this letter of authority is a critical aspect of compliance with the standards set by the Texas Department of Public Safety's Private Security Bureau, which governs the conduct and licensing of security personnel in the state. The other options, while relevant to general operational practices of a security company, do not specifically pertain to the legal prerequisites for employing commissioned security officers.