I went on the Western Cruise, there is no dress code. I will say though that my partner and I did not bring dress up clothes for formal night and felt really awkward when we were surrounded by some beautiful dressed in black and white dresses, and tuxes. We also didn't understand crazy hat night, so didn't bring a hat. On the ship there was a formal restaurant, we did call to make reservations. We were told jeans were not allowed and could not dine at that restaurant. Because of our experience we are more prepared for the 40th cruise.