As Nurse Natalie has pointed out, this is not just a lack of persons trained to provide EMS type services or a transport issue. There is a need for a equipped location in which to treat in an emergency 24/hrs a day.
The Polyclinic is centrally located close to the airport and could easily be outfitted to be able to provide a broader range of support services to those trained to provide rescue care / stabilize patients. At this point, the Polyclinic provides little more than Public Health - vaccines, etc. If you toured the facility, it is obvious that the design resembles more of an Emergency Room set up.
However, I believe the issue is that the Polyclinic does not provide on-call services and has very little Physician coverage (if at all). And since the Belize Government "owns" the clinic, they do not currently authorize "on call" private physicians who are not employed by them to use the facilities.
Too bad they can't just credential the Physicians and have their support staff on call to provide access / assist with the Emergency.