The CNMC is competent to challenge in court administrative acts and regulatory provisions ranking below the level of law when these produce obstacles in relation to effective competition in the markets. The capacity to bring legal actions is set out both in artícle 5.4 of Law 3/2013 of 4 June on creation of the CNMC and in article 27of Law 20/2013 of 9 December on Ensuring Market Unity.
Some of the CNMC's legal challenges are accompanied an expert Economic Report whose objective is to perform an economic analysis of the restrictions on competition subject to legal challenges. They sometimes incorporate a quantification of the costs that such restrictions entail for consumers and social welfare. The Economic Reports seek to strengthen the economic arguments of the legal challenges and thus contribute to the defence and promotion of effective competition and efficient economic regulation in the Spanish economy.
The Economic Reports issued by the CNMC can be consulted below (regardless of whether they are part of legal challenges conducted within the framework of article 5.4 of the Law on creation of the CNMC or within the framework of article 27 of the Law on Ensuring Market Unity).