When I booked, there was nothing visible that stated drivers needed to be 28. It just let me book for adults without notification. So my son and I spent half a day driving and calling all over the island and Port Isabel trying to purchase a “deferral” that SPI Excursions recommended. We could not find any place to do this. So the company did try to adjust our reservation time so that we could find and purchase the deferral, but we were not refunded when there was no place to purchase the exemption to allow my 18 year old to drive. My only true complaint was that I feel the booking was deceptive as it did not state the Texas law and allowed me to book for 2 adults. To me, that is over 18. By time I found out about the law, it was too late to get a refund or to find an alternative solution. We never got the chance to experience this excursion, but we’re not refunded any of our money.