What legislation regulates Firmaprofesional and the certificates?

Law 59/2003, of 19th December, on electronic signatures
BOE (Official State Gazette) 27/02/2004 MINISTRY OF THE PRESIDENCY
ROYAL DECREE 292/2004, of 20th February, on the creation of a public trust mark for information society services and electronic commerce and regulating the requirements and procedure to be fulfilled.
BOE (Official State Gazette) 09/09/2003 MINISTRY THE PRESIDENCY
ORDER PRE/2440/2003, of 29th August, establishing the regulation of the fee for assigning the limited resource of domain names with the country code of Spain (.es)
BOE (Official State Gazette) 12/07/2002 HEAD OF STATE
LAW 34/2002, of 11th June, on information society services and electronic commerce. (Includes error correction [BOE 06/08/2002])
(Modified by the First Final Provision of Law 32/2003)
(Modified by the Eighth Additional Provision of Law 59/2003)
BOE (Official State Gazette) 22/02/2000 MINISTRY OF DEVELOPMENT
ORDER of 21st February 2000, which approves the Regulation on the accreditation of certification service providers and the certification of certain electronic signature products.
BOE (Official State Gazette) 15/05/2003 MINISTRY OF FINANCE
ORDER HAC/1181/2003 of 12th May, which establishes specific rules on the use of electronic signatures in tax relationships by electronic, computer and telematic means with the State Tax Administration Agency.
BOE (Official State Gazette) 28/11/2003 MINISTRY OF THE INTERIOR
ORDER INT/ 3298/2003, of 13th November, which creates a telematic register in the Interior Ministry and regulates the technical requirements and conditions for receiving or issuing applications, documents and communications transmitted by telematic means.
BOE (Official State Gazette) 15/09/2003 MINISTRY OF SCIENCE AND TECHNOLOGY
ORDER CTE/2500/2003, of 2nd September, which creates a telematic register in the Ministry of Science and Technology and regulates the technical requirements and conditions for receiving or issuing applications, documents and communications transmitted by telematic means.
BOE (Official State Gazette) 19/09/2003 MINISTRY OF ECONOMY
ORDER ECO/2579/2003, of 15th September, which establishes specific rules on the use of electronic signatures in relationships by electronic, computer and telematic means with the Ministry of Economy and its affiliated Bodies.
European Parliament and European Council Directive establishing a common framework for Electronic Signatures: DIRECTIVE 1999/93/EC