  We consider the possibility of violations of the selection rule $\Delta
S=\Delta Q$ at an appreciable level in {\it exclusive} semi-leptonic decays of
Kaons. At $\Phi$-Factories, intense Kaon beams will be available and will probe
among others, the semi-leptonic decays $K_{l4}$ and $K_{l3\gamma}$ in addition
to $K_{l3}$ and could provide novel testing grounds for the $\Delta S=\Delta Q$
rule. In particular, the branching ratio of $K_{l3\gamma}$ is non-negligible
and could be used to probe new phenomena associated with the violation of this
selection rule. Furthermore, we modify certain di-lepton event rate ratios and
asymmetries and time asymmetries that have been constructed by Dass and Sarma
for di-lepton events from Beon decays to test the $\Delta B=\Delta Q$ at the
$\Upsilon (4S)$, to the Kaon system at the $\phi(1020)$. We find that the large
width of the $K_S$ relative to that of $K_L$ plays an important role in
enhancing some of the time asymmetries.
