This is civil jurisdiction of Compelled Performance which also has Criminal Penalties for not adhering to the letter of the contract, but this only applies to International Contracts. Now we can see what jurisdiction the seatbelt laws (all traffic codes, etc) are under. Whenever there is a penalty for failure to perform (such as willful failure to file), that is Admiralty/Maritime Law and there must be a valid international contract in force.
However, the courts don’t want to admit that they are operating under Admiralty/Maritime Jurisdictions, so they took the international law or Law Merchant and adopted it into our codes. That is what the Supreme Court decided in the Erie Railroad case (Erie Railroad v. Tompkins, Supreme Court, 1938) – that the decisions will be based on commercial law or business law and that it will have criminal penalties associated with it. Since they were instructed not to call it Admiralty Jurisdiction, they call it Statutory Jurisdiction.