Which law govern when statutory law conflict with regulatory law?
Statutes rule! Regulations are just rules for carrying out the law the legislature made by statute. If the regulation is inconsistent with the statute (and sometimes they are) they can be challenged in court or in an administrative hearing.
In the United States, laws can be enacted by federal, state or local authorities. There are the following categories: Constitutional law- the fundamental law in the US Case law- federal and state Statutory law- federal and state civil and criminal Administrative law Regulatory law Local ordinances Each branch of government produces a different category of law: Legislative Branch : Statutory Law Executive Branch : Regulatory and Administrative Law Judicial Branch : Case Law