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Law No. 3/1991 of January 10, 1991, on Unfair Competition (as amended up to Law No. 1/2019 of February 20, 2019)

Latest Version in WIPO Lex
Year of Version 2019 Dates Amended up to: March 13, 2019 Entry into force: January 31, 1991 Published: January 11, 1991 Promulgated: January 10, 1991 Type of Text IP-related Laws   Subject Matter Trademarks, Trade Names, Competition, Undisclosed Information (Trade Secrets) Subject Matter (secondary) Enforcement of IP and Related Laws, Other Notes This consolidated text of Law No. 3/1991 of January 10, 1991, on Unfair Competition incorporates all the amendments up to Law No. 1/2019 of February 20, 2019, on Trade Secrets, which was published on February 21, 2019, and entered into force on March 13, 2019.

The Second Final Provision of the said Law No. 1/2019 introduces amendments to Article 13, relating to violation of trade secrets under Chapter II entitled 'Acts Against Unfair Competition' of this consolidated version.


Available Texts Main text(s) Main text(s) Spanish Ley N° 3/1991, de 10 de enero de 1991, de Competencia Desleal (modificada por la Ley N° 1/2019, de 20 de febrero de 2019) PDF HTML
Related Legislation Supersedes (2 text(s)) Supersedes (2 text(s))
Law No. 3/1991 of January 10, 1991, on Unfair Competition (as amended up to Law No. 29/2009 of December 30, 2009)(ES154)
Law No. 3/1991 of January 10, 1991, on Unfair Competition(ES021)
Is amended by (4 text(s)) Is amended by (4 text(s))
Law No. 1/2000 of January 7, 2000, on Civil Procedure (version published on April 15, 2019) (ES245)
Law No. 1/2019 of February 20, 2019, on Trade Secrets (ES229)
Law No. 29/2009 of December 30, 2009, on Amendments to the Legal Regime Governing Unfair Competition and Advertising for the Improvement of Consumer and User Protection (ES137)
Law No. 19/2006 of June 5, 2006, on the Extension of the Means of Protection of Intellectual and Industrial Property Rights and Laying Down Procedural Rules for the Facilitation of the Application of Various Community Regulations (ES107)


WIPO Lex No. ES230