I appreciate the encouragement; thank you all. I am sure after the radiation, I'll be fine and ready for the second 50 years of my life. BTW, Men don't wait putting off your PSA test. It's a simple blood test and doesn't hurt.
Now for the topic at hand. Good question! I am sure that initially the rental business will have to disappoint a few people who want to do a last minute rental. I have rented in the past and the 18' boats are usually well booked weeks if not months ahead of time during the prime season. As a rule, the rental companies will have to require to see the certificate as they are the ones who are ultimately responsible if any laws are broken.