There was a thread on here that gave some details by state regarding what is considered illegal. I am sure some industrious poster can find you the link if you are unable to find it.

However, what is really important is knowing what is enforced in a particular area and for that you probably have to depend on your local Domme to know and be on top of that.

I can tell you what activities should not be done/offered in my area, but I haven't the foggiest idea about say, Des Moines Iowa.