It was instituted by Napoleon I Bonaparte's Constitution of the Year VIII "in order to moderate the other powers" by discussing every legislative project, sending its "orateurs" ("orators", i.e. spokesmen) to defend or attack them in the Corps législatif, and asking the Senate to overturn "the lists of eligibles, the acts of the Legislative Body and those of the government" on account of unconstitutionality. Its 100 members were designated by the Senate from the list of citizens from 25 years up, and annually one fifth was renewed for a five-year term.