(i) Casino. A casino or gambling casino that: Is duly licensed or authorized to do business as such in the United States, whether under the laws of a State or of a Territory or Insular Possession of the United States, or under the Indian Gaming Regulatory Act or other Federal, State, or tribal law or arrangement affecting Indian lands (including, without limitation, a casino operating on the assumption or under the view that no such authorization is required for casino operation on Indian lands); and has gross annual gaming revenue in excess of $1 million. The term includes the principal headquarters and every domestic branch or place of business of the casino.
31 CFR § 1010.100
When used in this chapter and in forms prescribed under this chapter, where not otherwise distinctly expressed or manifestly incompatible with the intent thereof, terms shall have the meanings ascribed in this subpart. Terms applicable to a particular type of financial institution or specific part or subpart of this chapter are located in that part or subpart. Terms may have different meanings in different parts or subparts.