means a portion of one or more countries comprising:
- an entire water catchment from the source of a waterway to the estuary or lake, or
- more than one water catchment, or
- part of a water catchment from the source of a waterway to a barrier that prevents the introduction of a specific disease or diseases, or
- part of a coastal...
Part of a coastal area or an estuary of one or more countries with the precise geographical delimitation that consists of a homogeneous hydrological system (modified after OIE).
Means a clearly defined part of a country containing an animal subpopulation with a distinct health status with respect to a specific disease for which required surveillance, control and biosecurity measures have been applied for the purpose of international trade.
means identifying zones for disease control purposes.
Means any disease or infection which is naturally transmissible from animals to humans.