Most folks have trouble understanding the licensing. I have developed a simple sheet with PDA that helps one understand what to go through to get a license. We offer the test in numerous Extension Offices. I provide the Lebanon testing opportunities. Here is the link. If you employ someone or if you are required to have a license to be employed you will need to follow up and take the exam.
http://lebanon.extension.psu.edu/Agriculture/PestLicTestDates.pdf