  The successful explanation of fermion mixing and of the fermion mass
hierarchy by the Dualized Standard Model (DSM) scheme is based on the premises
of a fermion mass matrix rotating in generation space with changing scales at a
certain speed, which could in principle lead to sizeable flavour-violation
observable in high sensitivity experiments such as BaBar. However, a full
perturbative calculation to 1-loop order reported here shows that this
kinematical, flavour-violating effect of a rotating mass matrix is off-set in
the DSM by parallel effects from rotating wave functions and vertices giving in
the end only very small flavour-violations which are unlikely to be detectable
by present experiments. The result means that at least for the present the DSM
scheme has survived yet another threat to its validity, which is indeed its
most stringent and dangerous to-date. It also provides some clarification of
certain concepts connected with the rotating mass matrix which had previously
been found puzzling.
