[A} maxim’s legal character must be intrinsic: it must have what I shall call ‘lawlike form.’ this is why legal character, or universality, must be understood as lawlike form, that is, as a requirement of universalizability

[A} maxim’s legal character must be intrinsic: it must have what I shall call ‘lawlike form.’ this is why legal character, or universality, must be understood as lawlike form, that is, as a requirement of universalizability (Christine M. Korsgaard, Creating the Kingdom of Ends)