On step 1 (Shipping) of the checkout process, some of the fields - such as Zip/Postal Code - trigger re-evaluation of the list of available shipping methods.
I have a custom plugin in place that disables Free Shipping if the user chooses a non mainland-US state. Unfortunately, the "State/Province" select box does not trigger the AJAX call to "estimate-shipping-methods" which is needed to rebuild the list of shipping methods.
Does anyone know how to attach this event to the select box? I DON'T want a hacky answer like using jQuery to trigger onkeyup/onchange on one of the fields that already has the event attached to it.