Substantive and procedural rules developed through decisions of courts and similar tribunals, commonly called judge made or case law, rather than through legislative statutes or executive action.
A substantive rule is a rule about our behaviour. Examples: We can't steal or commit murder.
How things should be done. Examples: The rules governing the admission of evidence or witnesses into court
Law that has been created by Parliament in the form of legislation. Example below. The courts still have an important role to play in determining the operation of legislation. Example: Statutory interpretation. This is despite the fact that there is no legislative or express democratic authority for the court to be law-makers.