It does, in fact, have its own laws and culture.

[Naoto did make sure of this earlier when she spoke to the empress of Spring.]

Rather, each faction enforces its own laws, creating an identity that separates it from the other three. [Naoto raises four fingers now, thumb, index, middle and ring, counting from the last to the first in order.] Light, Spring, Blood and Ice seem to all be different, and naturally each of their heads have their own unique titles and mannerisms. It's like four different countries have decided to be neighbors.