  The Jarlskog rephasing invariant parameter $|J|$ is evaluated using one of
the six Unitarity Triangles involving well known CKM matrix elements \vud,
\vus,~\rub, ~\vcd, ~\vcs~ and ~\vcb. With PDG2000 values of \vud~ etc. as
input, we obtain $|J|=(2.71 \pm 1.12) \times 10^{-5}$, which in the PDG
representation of CKM matrix leads to the range $21^o~to~159^o$ for the CP
violating phase $\delta$. The CKM matrix elements evaluated using this range of
$\delta$ are in agreement with the PDG CKM matrix. The implications of
refinements in the input on $|J|$, $\delta$ and CKM matrix elements have also
been studied.
