Andrew's comment brings up a separate, but serious, issue.
Suppose the Hong Kong chapter had initially declared itself the Chinese
chapter - would that forever preclude the creation of other, separate
chapters within the geographical territory of China? That presents a
first-past-the-post incentive, and might encourage prospective chapters to
describe themselves in as broad a way as possible.
I don't think that the New York chapter ought to have declared itself a
United States chapter, even if it had declared a broad scope and intent, and
I don't think that if it had done that future chapters of a smaller area
should be barred. The geographic limitations on chapters should be
re-evaluated, perhaps with an eye towards requiring the selection of a
single jurisdiction for each chapter (in the US, perhaps
federal/state/local) and only one chapter per jurisdiction.