Identical relations for the forms with a Young symmetry

Let there be given a Young symmetrizere . Consider the space of multilinear forms obtained by actione . In the paper the characteristic property in terms of identities is found for a multilinear form to belong to this space. This property is analogous to the well-known identities for the cases of the spaces of the symmetric and skew-symmetric forms. In addition, a generalization of Garnir identities is obtained.