What’s the difference between a statutory crime and a regulatory one?
Statutes are acts of legislation, written and voted on by the legislature and signed into law by the executive.
Regulations are rules that have the effect of law, but which are created by regulatory agencies rather than elected officials.
A statutory crime is one that is created by a statute. A regulatory crime is one that is created in a regulation.
Don’t forget counties / parishes. And I’m fairly certain there are other government-like organizations which have power of law, such as water management districts.