You and I -- and even BillyMac and his multiple personalities -- we understand what the rule is on this, how it's applied, etc. But it is far from crystal clear and it usually generates a question or two from new officials. And I agree, the wording of question 9 is less than ideal. I don't think it's really tricky or unclear, just less than ideal.

However, I disagree with your conclusion. As question 9 is written, the answer is clearly true. The difference between "shall" and "may" is significant. But don't get trapped into thinking of them as mutually exclusive. "Shall" is sufficient to meet the conditions of "may". That "shall" goes beyond "may" does not negate that sufficiency. To require a thing (shall) logically implies that we allow (may) it. And the question only asks if we allow it. Which we do.

Perhaps rather than lamenting the potential confusion of the rule and question you should grasp the opportunity to discuss this rule with your students.