  The hierarchy amongst the CKM matrix elements, highlighted recently by Luo
and Xing, has been rigorously revisited using the PDG parameterization
incorporating unitarity constraints. Further, we have explored the evaluation
of the CP violating parameter \epsilon_k for the 9 possible unitarity ensured
equivalent independent parametrizations of CKM matrix. Interestingly, we find
that not all of these reproduce the value of parameter \epsilon_k, this being
presumably due to the hierarchical nature of the CKM matrix elements. This
situation is echoing similar conclusions regarding the evaluation of Jarlskog's
rephasing invariant parameter J through unitarity ensured equivalent
possibilities.
