[en] A new method is proposed for deriving the model independent dispersion restrictions rules on differential cross section for the Compton effect on the arbitrary spin target based on the use of t-channel helicity amplitudes. The simplicity of this formalism is shown that is valid for any binary reaction. In such an approach basic conditions are fulfilled which are required for the formalism when deriving dispersion inequalities: the differential cross section is expressed in terms of modulus of amplitudes from which the kinematic singularities in variable ν are separated out