From the page I was looking at...Radix are on the endangered list in Ohio. Yes...up to four as long as they are easterns or Butler's garters. As far as bringing snakes in from out of state, we have the same law in Delaware...something about bringing out of state species in or something. I wouldn't worry about it if you want to say...purchase an eastern from a breeder out of state and bring it into Ohio...they just don't want a bunch of out of state species being introduced into the state in the natural habitat. Here is the link to what I was reading. It is the revised Ohio law concerning wildlife possession effective Jan 1, 2011: Reptiles & Amphibians Licensing and Regulations