  We have explicitely calculated the tree level elastic scattering cross
sections of two longitudinal gauge bosons, up to four derivatives in the chiral
expansion both with and without using the Equivalence Theorem (ET). The
numerical results show the existence of new and severe restrictions in the ET
energy applicability range, as it was stated in our recent derivation, which we
also review here, of the precise ET version in the Chiral Lagrangian
description of the Standard Model Symmetry Breaking Sector.
