. Introducción -I.La matización del carácter objetivo de la ruina y su desvinculación del límite del deber de conservación en las legislaciones urbanísticas y de Patrimonio cultural. -II. Los nuevos contenidos del deber de conservación. -III. Los límites del deber de conservación y los supuestos de ruina "técnica" y "económica". -IV. Ruina "urbanística" y supuestos conexos: las calificaciones de fuera de ordenación e inadecuación como instrumentos de ejecución del planeamiento. -V. El procedimiento administrativo de las órdenes de ejecución y de la declaración de ruina. En particular, la ruina inminente. -Bibliogafía.

New Instruments in Spatial Planning addresses the topic of transferring development opportunities between areas in planning practice by a debate between academics, lawyers and planning practitioners at an international planning symposium in Annapolis, MD, USA and the Van Doorne-Habiforum conference on Transferable Development Rights a year later. The idea of transferring development opportunities between areas is more than only the transfer of development rights. It relates more to compensation: not in money, but in a non-financial perspective. A comparative study on non-financial compensation was started, funded by Habiforum and linked to a number of research projects, such as Van Der Veens and Spaans research funded by the Delft Centre for Sustainable Urban Areas and Janssen-Jansens research funded by the Dutch Scientific Organization NWO-STIP. The chapters in this publication are representative of a close cooperation between planners, economists and lawyers from both science and planning practice. The exchange of knowledge within the framework of this book has arisen from divergent paths.