%0 Journal Article %T TEOR¨ªA DE LA IMPREVISI¨®N: LA NECESIDAD DE SU REGULACI¨®N LEGAL EN CHILE %A Momberg Uribe %A Rodrigo %J Revista chilena de derecho privado %D 2010 %I Scientific Electronic Library Online %R 10.4067/S0718-80722010000200002 %X traditionally, chilean legal doctrine has discussed the convenience of a statutory regulation of the imprevision theory or supervening excessive onerousness. although contemporary legal doctrine accepts its application based on the existing legal texts, there is no agreement about its express statutory recognition. in a recent decisi¨®n, the supreme court rejected the application of imprevisi¨®n because it is not expressly regulated and it opposes the provisions of the civil code. the paper states as a hypothesis the need and convenience of its regulation through an express statutory text. besides, three essential features of that regulation are analyzed: the concept of imprevision, the legal nature of the norms and its scope. %K unforeseen circumstances %K excessive onerousness %K reform of the chilean civil code. %U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0718-80722010000200002&lng=en&nrm=iso&tlng=en