(a) A person commits an offense if the person knowingly wagers on the result of a horse or greyhound race conducted in this state that:
(1) is held on an American Indian reservation or on American Indian trust land located in this state; and
(2) is not held under the supervision of the commission under rules adopted under this subtitle.
(b) An offense under this section is a felony of the third degree.
(c) It is an exception to the application of this section that the person is a member of a recognized Texas Indian tribe who lives on a reservation or on trust lands located in this state.