Since Mississippi law doesn’t require the floating vessels to actually resemble a boat, most all of the casinos in Biloxi, as well as elsewhere in Mississippi, are built on barges.
Both of those Biloxi casinos are now gone. On August 1, 1992, the Isle of Capri in Biloxi was the first Mississippi casino to open, followed one month later by The President. This allows the riverboats to offer 24-hour dockside gambling.
Mississippi gaming law requires all riverboat casinos to be permanently moored at a dock and they are not allowed to cruise. However, there are also some Biloxi casinos that are land-based. Many of the casinos in Biloxi are all located on riverboats.