Complex sentence: The general principles of law are not codified or spelled out in statute, but rather are derived from the spirit of the body of law; in other words, these principles have been established and laid out over time by the Council through administrative case law.
Split into simpler sentences: The general principles of law are principles that are not found in any statute but derive from the spirit of the body of law. These principles have been established and laid out over time by the Council through administrative case law.