Airline officials updated Spirit’s contract of carriage on Wednesday, which outlines how travelers should present themselves, or face being not allowed to board or "required to leave an aircraft." ...

By law, airlines have the right to remove passengers from their planes for a variety of circumstances and must outline their policies in their customer agreement in a contract of carriage.

On Jan. 22, Spirit updated its contract of carriage to specify fashion faux pas that could leave certain customers grounded at the gate. The airline may bar passengers who are “barefoot or ...