The most relevant applicable legislation is referred to below.

• Directiva 2004/18/CE del Parlamento europeo y del Consejo de 31 de marzo de 2004 sobre coordinación de los procedimientos de adjudicación de los contratos públicos de obras, de suministro y de servicios.
• Royal Legislative Decree 3/2011 , of November 14, which approves the revised text of the Public Sector Contracts Law.
• Royal Decree 1098/2001 , of October 12, which approves the general regulations of the Public Administration Contracts Law.
• Royal Decree 817/2009 , of May 8, which partially develops the Public Sector Contracts Law.
• Law 34/2002 , of July 11, on services of the information society and electronic commerce.
• Law 11/2007 , of June 22, on electronic access of citizens to Public Services.
• Directive 1999/93 / EC of the European Parliament and of the Council of December 13, 1999, establishing a community framework for electronic signatures.
• Law 6/2020 , of November 11, regulating certain aspects of electronic trust services.
• Action Plan on i2010 eGovernment : Accelerating eGovernment in Europe for the benefit of all. April 25, 2006.
• GREEN PAPER on the generalization of the use of electronic public procurement in the EU. October 2010.
• Law 40/2015, of October 1, on the Legal Regime of the Public Sector.