This is not SAT unfortunately. Your score and your behaviour are both needed for a license. Besides, in situations like these attendance policy is important. You can't test every single edge case possible on a test. The state has to answer if a license holder says "I did not know X." As a taxpayer, you would question why the hell does a person who does not know X has state license to practice?
Unless you're asking every person to recite the whole textbook, the only way to be sure is an attendance policy.
Unless you're asking every person to recite the whole textbook, the only way to be sure is an attendance policy.