Which of the following is not required in the employee file of each private detective employee for five years after termination?

The correct choice indicates that a copy of the employee's permanent registration application is not required to be maintained in the employee file for five years after termination. In the context of Illinois private detective practice, the emphasis is placed more on documentation that directly pertains to the employee's qualifications, training, and compliance with firearms regulations.

Original training certificates are crucial as they validate that the employee has completed the necessary training, which is a fundamental requirement for maintaining licensure in private security services. Similarly, weapon discharge reports and the Firearm Owner's Identification Card are critical as they ensure that the employee is properly certified to carry firearms and has demonstrated safe handling practices, aligning with state regulations.

In contrast, the permanent registration application, while it may be important at the time of initial registration, does not hold ongoing importance after termination. Its relevance wanes as it is more about the initial entry into the professional registry rather than ongoing qualifications or compliance once an individual has left the company. Thus, it is reasonable that this document does not need to be retained for such an extended period compared to the other documents.