Is there a global HS Code? No. You should know exactly what the specific number in your specific country. But the first 6 digit numbers are supposed the same across the whole world. Each country can modify by adding two digits or four digits as per their requirements without changing first six digits.
BLENHEIM, in Hanover, is a place-name found also in Manchester, and originates from Bavaria, Germany. Blenheim (in Germany) was a site of a great battle, which no doubt led to use of the name in Jamaica.
The vast majority of economic activity takes place within Kingston, and as most government ministries are located in the city, it is a key force in legislation in regards to Jamaica's finances. The high population density of the capital city means that the majority of monetary transactions occur in Kingston - stimulating much of Jamaica's local economy.