1. The Constitution (the supreme source: the organs' provisions, the rights, the review jurisdiction).
2. The statutes (the enabling acts — every administrative power's parent; the procedure acts).
3. The delegated legislation (the rules-regulations-and-by-laws — U3.3-U4).
4. The judicial decisions (the writ jurisprudence — the SC's administrative case law).
5. The customs-and-practice (the administrative usage; the precedents' conventions).
6. The international-and-comparative faces (the treaties' administrative implementation; the borrowed doctrines — the droit administratif's influence of U2.2.14).