Which of the following is NOT required to obtain a PERC?

To obtain a PERC (Permanent Employee Registration Card) in Illinois, certain requirements must be met, and one of these is not the necessity of having a high school diploma. The PERC does not stipulate educational qualifications like a high school diploma or higher as a prerequisite; instead, applicants primarily need to provide verification of their identity and complete necessary background checks.

In contrast, a government-issued ID is essential for identity verification, as is the completion of background checks to ensure the applicant has no disqualifying criminal history. Proof of residency is also typically required to establish the applicant's address for registration. Therefore, the requirement of a high school diploma is the aspect that is not necessary for obtaining a PERC.