Stannary law
Stannary law (derived from the Latin: stannum for tin) is the body of English law that governs tin mining in Cornwall and Devon; although no longer of much practical relevance, the stannary law remains part of the law of the United Kingdom and is arguably the oldest law incorporated into the English legal system. The stannary law's complexity and comprehensive reach into the lives of tin miners necessitated the existence of the legislative Stannary Convocations of Devon and Cornwall, the judicial Courts of the Vice-Warden of the Stannaries, and the executive Lord Warden of the Stannaries.