First,it's not a septic system, it's just some sort of storage for waste. It could be tanks or some sort of composting toilet.
Depends on where you live.
Really, there exists somewhere an "inspector of RV toilet systems"
If there is one, my first order of business would be to move.
Seriously Jennifer, I don't think you have much to worry about. Even the places that require you to have such things in order for it to be called an "RV" aren't even going to
check to see if it's hooked up.
And welcome aboard.
It's good to ask questions