The Public Prosecution Ministry, without prejudice to the functions entrusted to other bodies, has as its mission, the promotion of Justice in defence of the rule of law, the rights of citizens and the public interest protected by the Law, ex officio or at the request of the interested parties, as well as to ensure the independence of the Courts and to seek before them the promotion of social interest (art. 124 EC). The Public Prosecution Ministry exercises its functions through its own bodies, in accordance with the principles of unity of operation and hierarchical subordination subject in all cases, to the rule of law and impartiality. The basic law that regulates the Spanish Public Prosecution Ministry is the Organic Statute of the Public Prosecution Ministry, approved by Law 50/81, of 30th December, and modified by Law 24/2007, of 9th October. The Public Prosecution Ministry is a single body for the entire State and its members are the authority for all purposes, always acting as representatives for the whole Institution.
The Solicitor General of the State represents the State and depends functionally on the Ministry of Justice. It is the governing body for the services that provide legal assistance to the State and to other public institutions. It is led by the Solicitor General of the State and appointed by the Council of Ministers.
A concept regulated in article 125 of the Spanish Constitution, giving legitimacy to any citizen to present themselves in a criminal judicial process, even if they have not been directly affected by the crime in question. It is a form of civic participation in the justice system and characteristic to Spain; it does not exist in other countries. Even though it is permitted both for individuals and corporate entities, it is very common for it to be carried out by groups, associations or even political parties.