Law 30/2014 of December 3 on National Parks, establishes in its article 24 that the Board of Trustees is the participating body for society in the National Parks. A Board of Trustees shall be constituted in each of them, and it will have at least representatives from: the Central State Administration, the Communities and Local Administrations, the social agents of the area, as well as those institutions, associations and organizations related to the Park, or whose purposes are consistent with the objectives of this Law.

In its second section, it is provided that the National Parks Board of Trustees will be attached, for administrative purposes, to the Community the National Park is located in. Should any National Parks be located in several Communities, these will reach an agreement for the secondment of the Board of Trustees.

The Decree of March 27, 2014, published in the Official Bulletins of both Communities on March 30, determines the Board of Trustees composition and functions.

Article 8.2. Of Law 7/2013 provides that the State and the Communities of Madrid and Castilla y León will coordinate their actions within the framework of the Coordination Committee. This Commission is composed of four representatives of the General State Administration and two members of each of the Autonomous Communities and was constituted in the first session held on September 17, 2013.

The Decree of March 27, 2014, published in both Communities Official Bulletins on May 30, approves the Statutes regulating the management and participation bodies of the Sierra de Guadarrama National Park. It provides the creation of the Management Committee as a coordinated management body of the National Park. In it will be represented the Communities of Madrid and Castilla y León, and it is formed by three representatives appointed by the Communities. The Co-Directors are entitled born members.