Here's an intersting article from 2003 that says that the planters in Darjeeling are not investing enough in replanting their tea trees and that the tea is becomeing more inferior, therefore why protect the name of Darjeeling (meaning Darjeeling tea has to be produced in Darjeeling to be called that) instead of letting people buy "Darjeeling" tea from other places than Darjeeling.
Discuss if you like
Melinda