Sec. 17. "Riverboat" means any of the following on which lawful gambling is authorized under this article:
(1) A self-propelled excursion boat that complies with IC 4-33-6-6(a) and is located in a county that is contiguous to Lake Michigan or the Ohio River.
(2) A casino located in a historic hotel district.
(3) A permanently moored craft operating from a county described in subdivision (1).
(4) An inland casino operating under IC 4-33-6-24.
(5) A casino operated in Gary under IC 4-33-6-4.5.
(6) A casino operated in Vigo County under IC 4-33-6.7.