On dynamics of hard elastic scattering of hadrons

The main contribution to hard elastic scattering at high energies comes from components of wave functions of colliding hadrons that contain minimal number of partons. We discuss the details of such a mechanism in the regge and parton approaches and estimate the probability that colliding hadrons are in bare states containing only valent partons. The behavior of cross sections in this regime at various energies can give nontrivial information on high energy dynamics.