All kits will become apprentices at the age of 6 moons or older. No apprentices younger than 9 moons of age will fight in major battles. What your leader says is the code unless your leader's orders are breaking the code themselves. Cross-Clan relationships may occur, but they may not be with cats of Clans that are enemies to your Clan. Medicine cats may have mates and kits, but they may not let either distract them from work. Entering another Clan's territory is only justifiable if in emergeny situation, with members of the Clan which owns the territory, or if you are assisted by/are a leader, deputy, or medicine cat.