Two or three of you have mentioned asking if everyone understands the new rules and then the situation follow-up is that they didn't understand. As BITS said this is poor communication.
YOU MUST TELL them the rule and how you will enforce it, or just be quiet and assume they understand it - which they should.
If you ask do they understand it, they are going to say "Yes." Then when you enforce it differently than they understood it... there went YOUR credibility. And because you have enforced it different from their expectation you have eroded the relationship with them.
Either explain it completely (probably the best thing to do early in the season or for a "unique" ground/facility rule) or completely leave it alone and just enforce the rule.
For the unique ground/facility rule, you've got to understand it exactly the same as everyone else (just like a rule). And it is more likely that rather than you explaining it to everyone, it will be a discussion among all the participants and a final agreement on how you will enforce the 'ground rule.' The situation is turned around from that of explaining rules; it is incumbent upon you to gain an understanding of how the home team wants this "ground rule" enforced.
just my nickel.
