Law 32/2006, of October 18, Regulating Subcontracting in the Construction Sector, came into force on April 19, 2007 in Spain. This law aims to improve the working conditions of the sector in general, and the safety and health conditions of workers in particular. To this end, it regulates contracts carried out under subcontracting arrangements for the following works: excavation; earthworks; construction; assembly and disassembly of prefabricated elements; conditioning or installations; transformation; rehabilitation; repair; dismantling"); demolition; maintenance; conservation and painting and cleaning work; and sanitation.