"American employer" means (1) an individual who is a resident of the United States; or (2) a partnership if two-thirds or more of the partners are residents of the United States; or (3) a trust, if all of the trustees are residents of the United States; or (4) a corporation organized under the laws of the United States or of any State.
"United States" includes the States of the United States of America, the District of Columbia, Puerto Rico, and the Virgin Islands.
820 ILCS 405/208.1