The third volume of the Code of Ethics for Building torno the figure of the expert, but not the one who is commonly considered as such, but one, a new expert and a new technical t, who, with a truly expert methodology and tica system, works at levels that the common expert does not reach. but based precisely on it, as si este professional would have evolved and surpassed himself, going from ser repairer of buildings and architectural works, to ser repairer of the profession and art of architecture.