  We present a relativistic treatment of the problem of soft electromagnetic
structure by the modified instant form of relativistic Hamiltonian dynamics.
Our approach uses relativistic parametrization and so picks out the
relativistic invariant quantities on each stage of the calculation. The
electromagnetic current matrix element satisfies the current conservation law
automatically. We use relativistic modified impulse approximation. It is
constructed in relativistic invariant way. For composite systems (including the
spin 1 case) the approach guarantees the uniqueness of the solution and it does
not use such concepts as "good" and "bad" current components. The approach
describes correctly the spin Wigner rotation and so gives the correct (QCD)
asymptotic.
