The aim of the article is to analyze the relationship between the valorization clauses included in FIDIC - clauses 13.7 and 13.8 - and the statutory provisions on rebus sic stantibus. In the light of recent developments in the Polish legal system, a view has been shared among the courts that the exclusion of the 13.7 and 13.8 FIDIC by the parties, should lead to automatic exclusion of any right of a party to request valorization based on the statutory grounds as well. It is this article's author's opinion that the view is wrong and the exclusion of the FIDIC valorization clauses should not automatically prevent the parties from invoking rebus sic stantibus rights and having their remuneration valorized to reflect change of the circumstances