  It is shown that upon considering an alternative form of a parity-violating
part of the transition electromagnetic current it is possible to reformulate
Hara theorem in a way that it does not forbid any more nonzero asymmetry in the
hyperon weak radiative decays $\Sigma^{+} \to p+\gamma$ and $\Xi^{-} \to
\Sigma^{-}+\gamma$ in the limit of exact $SU(3)_{f}$ symmetry thus resolving a
contradiction with the data and maybe revealing hitherto unseen transition
toroid dipole moments. A result is consistent with the traditional one on the
single-quark weak radiative transition models. We have also reproduced Vasanti
formula at the quark level. As for two-quark weak radiative transitions we have
found that the important part of it contains also a toroid dipole moment
contribution which seems to be an intrinsic reason of the apparent
contradiction between the Hara theorem conclusion and quark model results for
hyperon weak radiative decays.
