Abstract
In accordance with the mandate of the Constitution, which orders the public powers to protect historical heritage, and according to the autonomous design of powers, the different Autonomous Communities have been gradually approving their respective heritage laws. Laws passed in 1998 (Valencia, Madrid, Cantabria and the Balearic Islands) deal with the conservation of heritage, in accordance with the following approach: the generic duty of conservation, the conservation as a condition of certain files and obligations, the technical regulation of the interventions (technical criteria and execution of the works), the promotion and some specific formulas for the promotion of heritage, and the sanctioning regime as a guarantee of conservation.