Foreign State of Chargeability
The independent country to which an immigrant entering under the preference system is accredited. No more than 7 percent of the family-sponsored and employment-based visas may be issued to natives of any one independent country in a fiscal year. No one dependency of any independent country may receive more than 2 percent of the family-sponsored and employment-based visas issued. Since these limits are based on visa issuance rather than entries into the United States, and immigrant visas are valid for 6 months, there is not total correspondence between these two occurrences. Chargeability is usually determined by country of birth. Exceptions are made to prevent the separation of family members when the limitation for the country of birth has been met.
Source: U.S. Citizenship and Immigration Services