Final answer:
The PSISA does not cover individuals employed primarily in armoured vehicle services due to specific regulatory frameworks that govern the transportation of valuables, distinguishing them from other private security services.
Step-by-step explanation:
The Private Security and Investigative Services Act (PSISA) is a regulatory framework for the private security industry. According to the statement, the PSISA does not apply to persons who are employed primarily to provide an armoured vehicle service. This exception is likely due to specific regulations that govern the transport of valuables, which may fall under different regulatory frameworks, possibly with more stringent requirements given the nature of the work. Therefore, individuals providing armoured vehicle services, such as cash-in-transit operatives, are not regulated by the PSISA but by other applicable laws and regulations to ensure the safety and security of the services they provide.