Which of the following are not examples of personnel controls?

Background checks are personnel controls used to vet individuals before employment to assess their trustworthiness.

Reference checks are personnel controls used to verify information and assess a candidate's suitability for a role.

Strict access control mechanisms are technical or administrative controls implemented to restrict access to systems and data based on predefined rules. Personnel controls, by contrast, relate to the human element of security, such as screening, training, and management of staff.

Continuous security training is a personnel control designed to educate employees on security policies and best practices, maintaining awareness.