You can check things out here: http://www.customs.gov.bz/duty.html
P.S. It should be noted that alchohol duties are applied by volume and not by value.
This is what is (partially) on the site:
Wines or spirits not exceeding one litre in all and
Tobacco, not exceeding 250 grams or
Cigars, not exceeding fifty, in number, or
Cigarettes, not exceeding Two Hundred in number
Goods to the aggregate of BZ $200.00 through an International Airport (BZ$50.00 at other entry points) belonging to a Belizean passenger (including a passenger under eighteen years old) which accompany that passenger and were acquired abroad by him for his personal use or as souvenirs or gifts and admitted as such by the Comptroller of Customs.
It is a helpful site.