  We state the implications on the properties of vector mesons due to gauge
invariance. In particular, we find that polarized vector mesons exhibit a
property in the radiation distribution of order $\omega^{-1}$ in the photon
energy, namely it is null when the gyromagnetic ratio becomes $g=2$. Therefore,
the generalization of the Burnett-Kroll theorem for polarized vector-meson
states is held only if $g=2$. In addition, radiative interferences between the
electric charge and any gauge invariant term is found to be parametrized by a
common global factor which can be used to extract information of the involved
states by a proper choice of the kinematical region, where they could be
relevant.
