I have no idea how I violated this. I did have a few cu's locked in house but they were there to hold and in no way, was I using for skill gain.
This is why. Holding animals in the house is considered illegal to do.
Rule #6 of
Ultima Online Service Rules of Conduct
You may not leave an active character or
pet in game while unattended. If your character is performing a skill, text or action, you must be able to respond to a Game Master when one attempts to speak to you.
Couls also be this.
QUESTION
Can I keep my pets in my house?
Answer
You can leave pets in your house, but if they are not "refreshed" by being targeted or damaged, they will disappear. If you have a pet you would like to keep, seek out a stable master or animal trainer and stable the pet. All animals and creatures are subject to decay, even pets. To prevent a pet from decaying, it must take damage or be targeted periodically. If a creature is not targeted, or takes no damage, for approximately 2 hours (the amount of time can vary), the creature will decay and disappear. You can target your pet using a skill such as Animal Lore, Anatomy, or Evaluate Intelligence.
It is not legal to block NPC's or monsters with objects. The deliberate blocking of monsters or NPC’s with objects such as boats, crates, house tiles, invisible pets or invisible players with the intent to gain an unfair advantage, like skill gain or monster killing is considered an exploit and can result in account penalties. This also applies to “animal pens” or “Safe areas” in the game world. If the animal/monster cannot damage you, then you are abusing the system and will be asked to stop.
However there are times in which we will allow this. If your home is set up to be a stable, or you are showing off various animals of Britannia and these animals are not being used to gain skill, attack other players (in Trammel), or provide any unfair advantage to you or others then it is ok to leave your pets/animals in your home. However, please be aware that a Game Master may remove any wild pets if those pets are found providing an unfair advantage to other players or are causing an issue with the game in that area. These decisions are made on a case by case basis and players should follow the decision made at the time.