Eleven-dimensional CJS supergravity and the D'Auria-Fré group

An action for eleven-dimensional standard supergravity genuinely invariant under the D'Auria-Fré group is proposed. The construction of the action is carried out through a generalization of the Stelle-West-Grignani-Nardelli formalism. The action is genuinely invariant under this group without the need to impose auxiliary conditions such as a torsion-free condition.