Budget carrier Spirit Airlines quietly updated its contract of carriage Wednesday to include a more thorough dress code — which caught at least some unsuspecting travelers unawares. The new

Spirit Airlines’ policy update sparks debate about whether airlines can dictate what passengers wear on flights.

Spirit Airlines has revised its "contract of carriage" to include updated guidelines for passenger conduct and attire.

The airline clarified (somewhat) the attire and appearance that might prevent passengers from being allowed to board or remain on a plane, a move that goes a step further than other major U.S. airlines.

Spirit updated its dress code for passengers, prohibiting revealing or offensive attire. Violate the rules, and you could be banned from your flight.

Passengers flying Spirit Airlines may need to conceal some tattoos or put on more clothing for their next flight, according to the airline’s updated contract for travelers.

The revised policy specifies that travelers may not be allowed to board or may be asked to leave the aircraft if they are “barefoot or inadequately clothed (e.g., see-through clothing; not adequately covered; exposed breasts, buttocks, or other private parts), or if their clothing or body art is lewd, obscene or offensive in nature.”

Spirit Airline passengers can be turned away for offensive clothing, not adequately covered or for "an offensive body odor."

Spirit Airlines enforces a new dress code, banning transparent clothes and attire exposing private parts, in line with its updated contract of carriage.

Spirit Airlines customers have to don unprovocative clothes that do not expose “breasts, buttocks, or other private parts” when aboard the low-cost carrier, according to new standards posted this week.

Spirit Airlines has updated its contract of carriage to specify what types of clothing and body art are allowed on board.