1. Usually no animaguses, other species, half breeds, etc. are preferred in this school. Some are justified like werewolves and vampires, but just make sure that those species didn't feel like they were treated "unfairly" all except full humans are exempt from Carowang

2. Usually Professors and Students don't have close relationships. The school is strictly for learning, and relationships can get in the way of that.

3. Usually those with criminal backgrounds aren't even considered as candidates to get into Carowang. Gotta keep the students and staff safe!

4. Usually nothing excuses you from tardiness, absence, bad behavior, or lack of knowledge or progression in student's casses.

5. Quidditch is an honor to play in and a glorified sport to play, but usually Hwordwell always wins.

6. Usually Students have strict curfews and are not allowed outside of the school grounds unless told otherwise by the Headmaster himself.
At night...
If you are caught out of bed in your common room, points taken away
If you are caught out of bed in the halls, points taken and detention
If you are caught out of bed outside the school, you could be expelled

7. And finally, if you have any secrets,
Protect them with your life.
Professor Carowang is not a forgiving man.

...

The Minister of Magic is not a very friendly fellow to Professor Carowang and his siblings, so he tries to use every excuse he can to put the school down, or at least remove Carowang from the Headmaster position.