Iroran Paladin wrote:
Iroran paladins meditate on self-perfection and train relentlessly, knowing that their example can inspire others to excel. Irori offers no universal paladin code— each paladin in his service creates his own code as part of his spiritual journey, seeing the adherence to such a self-formulated creed as one of the many tests one must face to reach perfection.
To me, this means "Yes, they absolutely have to". Doing anything else would be such a big flavor fail that I honestly wouldn't allow it at my table.But what I'm quoting isn't rules text, and there are no rules that states that they all have to.