The Constitutional Court has released the Central Electoral Board (JCE) from being subject to government procurement rulings under the General Department for Procurement (DGCP), a dependency of the Ministry of Hacienda. The Constitutional Court ruling 305-14 indicates that no body of the Executive Branch can interfere in decisions by other public branches and autonomous constitutional bodies when they apply rules that do not affect the Constitution or the transparency with which they should carry out their work. The Constitutional Court says this does not mean they are exempt from controls.
http://www.diariolibre.com/noticias/2014/12/24/i939711_tribunal-constitucional-ejecutivo-puede-interferir-otros-poderes.html