Art. 1.420 is part of the texts that Civil Code of 2009 did not take from the old Code. The text allows – in the case of an event considered by the parties as a term, but being an event, however not realized – that the provisions of chapter dedicated by the Civil Code to the term as a modality of the civil legal act to become applicable.The present study includes, in its first part, an analysis of the substantial aspects relevant to the ...