Phxgrl: good question and one that I always have wondered what the answer is. I am in my 11th year of practicing in California as a civil lit defense attorney. Although I have never considered relocating to Belize to work, I did do some in-depth research into possible available work in Panama - may give you ideas or food for thought, even though Belizean law may be completely different.
A friend in Panama hooked me up with his corporate attorney in Panama City. The Panamanian attorney was kind enough to speak to me and e-mail me with tons of info.
--In order to practice law there, you must go to a Panama law school. But, you can only do that if you are a Panamanian citizen (born or naturalized) or from a Latin American country. So, struck down from the beginning for me.
--There are American lawyers there that act as consultants with Panamanian law firms, but they cannot sign legal documents (obviously). You really need to know somebody or have some unique and valuable credentials.
--If you are only allowed to work as a consultant, you must find some area that dovetails with your background (i.e. get a good angle on something). Was told there is a brisk business in Panama for admiralty litigation (which closely follows Louisiana law) and corporate law. Serving as a liasion for real estate transactions with American expats was another suggestion. A big need for those services there.
-- More than a few American expats who run long-time successful businesses there told me that I could do very well if I connected with a local accountant, but that is not my background. Apparently, it is a hot area where a very decent living could be made.
Given that Belize is a former English Colony, I would venture to guess that the law may be structured on English common law, but since Belize has been an independent country for many years, I would also bet there are lots of changes.
Give a shout out to any contacts you may have there or on this board who know of a reputable attorney that you can speak with. Fly down there and talk to people and feel it out.