Administrative law governs the relationships between individuals and the government or public bodies. It aims to ensure good governance principles like transparency, accountability, and adherence to the rule of law. Key concepts in administrative law include the separation of powers and natural justice. Natural justice, a fundamental principle, requires that decision-making be fair and unbiased. It encompasses two main rules - nemo judex in re sua, meaning one cannot judge their own case, and audi alteram partem, the right to be heard. Bodies must hear both sides of an issue before making a decision.