No, it is a United States thing. Most laws in the US are not code enacted by a legislature. Regulatory law, such as a federal , state county or municipal officials (like a head of the federal or state EPA, or a police chief, or a body that is not elected, say a zoning commission, has the ability to make administrative/regulatory law. They make more than congress does. Courts also make law (case law) including some of the most important and impactful law there is such as Roe v Wade, Brown v. Board of Education, Heller v DC, etc.While this appears to be incrementally good news for all respect constitutional rights, why is a police chief making decisions on what is legal? That seems like a huge conflict of interest. Is that a DC thing? The chief is able to repeal laws there?
State, county and municipal heads of policing agencies actually promulgate a fair amount of law when it comes to firearms across the US.
For example in Virginia, it was a finding (a memorandum) written by the AG a few years ago that defined exactly how non carry licensees could keep their guns in vehicles, including it being legal for non-licensees to loaded handguns an unlocked glove box. NY State's AG has made lots of regulatory law on firearms.