Law of Sierra

The legal system of Sierra is based on the and  s. Over the years, the Sierran legal system has incorporated aspects of Sierran. The most important source of law derives from the Constitution which outlines the basic functions, responsibilities, and powers of the Sierran federal government. There are four primary sources of law:, (from the Parliament or the monarch), regulatory law (from the executive branch), and the common law (includes both  and  deriving from the courts system). Nearly all federal law is complied and codified in the Sierra Federal Code, while the federal criminal law is indexed separately in the Sierra Penal Code.

Federal law takes precedence over provincial and local law through the Supremacy Doctrine established by the 1862 Supreme Court case Johnston-Phillips v. Inland Empire. Together, the Constitution and federal law, stand as the ultimate law in Sierra, and holds supremacy over all laws except in areas where the federal government is expressly prohibited by the Constitution and/or where the scope of law is delegated specifically to the provinces.

Most laws citizens encounter and experience are provincial laws. Under the Sierran federal system, each province are s and have their own legal system and government. Provinces are largely responsible for the establishment of their own, criminal, , , and laws, so long as such laws do not conflict any federal/constitutional laws.