Lots of companies are starting to require documentation
Due to bare boat accidents in the past, the Gov't of Belize
has threatened many times to require a captain
aboard with a Belizean liscence, but as yet have not. Maybe Sunasail/Moorings is tightening up to try and avoid this.
Did you charter
with them in other venues in the past? That might be a point of dscussion if so.
Re courses, if you feel your skills are up to it then you can just challenge these standards or some subset of them + take others as full classes