Legal: For an introduction to Jamaican legal materials see The Jamaican Legal System and Guide to Legal Research by Jeanne Slowe and Claudette Solomon.
The Laws of Jamaica (Acts) are posted by the Office of the Parliamentary Counsel, although a Disclaimer says the site may not be completely accurate or comprehensive. More Acts are available from the Ministry of Justice and through the Legislation Jamaica page of the World Law Guide.
The Supreme Court of Jamaica posts court rules, forms and Judgments (Opinions) back to 2003.
For copies of opinions not available online, call the Supreme Court Library (876-922-8719).
For more legal resources, see "Caribbean" and "Foreign Laws" entries.
Business: Companies doing business in Jamaica must register with the Office of the Registrar of Companies. You can search company and business names to see if they are active. You can retrieve business filings online if you register for an account.
General Information: For questions, you could try contacting the Embassy of Jamaica (202-452-0660) in Washington, D.C. or their Jamaica Information Service (202-986-0182).