We submitted the form for our July trip, and received a "Thank you for completing your registration" email. So I emailed them, asking if there was anything beyond that which we would receive that is needed for entry. This is the response they sent:
"Thank you for contacting vacation sxm, your application will not be valid for your travels in July you will need to reply for the system deletes applications after 30 days. We request that the Entry form be filled out 7days before your travels, or the latest would be your journey to St. Maarten. Hoping that I've provided you with adequate information."
Still not sure about our original question, but at least this gives clarity on their timeline.
.
