The sources of the Spanish legal system are: law, the habit and General principles of law (art. 1.1 of the Civil Code).
La jurisprudence It will complement the legal system with the doctrine that is repeatedly established by the Supreme Court when interpreting and applying the law, custom and general principles of law.
The legal rules contained in the international treaties they will not be directly applicable in Spain as long as they have not become part of the internal order through their full publication in the "Official State Gazette".