Thanks Amanda,
I have my CPTs license in BZ for greater than 40' so I am covered as my boat is a 29ft CC. I have sent an email to Lloyd Jones, BPA boss, and asked him but no reply. Sent emails to BZ Tax and customs to find out as well.
If all else fails I will simply launch from Chetumal and drive it to SP from there.
I did think about the "cruising in BZ" I will research that, thanks you are a gem.
Thanks John deVerteuil