Spirit Airlines updated its passenger "contract of carriage" to include examples of the clothing—or lack thereof—that is forbidden, reports Axios.

"A guest shall not be permitted to board the aircraft or may be required to leave an aircraft if that guest ... is barefoot or inadequately clothed (i.e., see-through clothing; not adequately covered; exposed breasts, buttocks, or other private parts), or whose clothing or article, including body art, is lewd, obscene, or offensive in nature," the updated contract reads.

Before, the contract said that passengers might be denied plane entry or required to leave if they were "barefoot or inadequately clothed," or if their "clothing is lewd, obscene, or offensive in nature." It did not specify tattoos, however, or clarify what constituted "lewd."

The update comes a few months after three women were reportedly removed from a Spirit flight for wearing crop tops. In October, two of the women told KABC, an ABC affiliate station, that they wore sweaters to board the plane but took them off once they sat down as the air conditioner wasn't on. They were wearing crop tops underneath. They said a flight attendant told them to "put something on," and when they didn't, they were kicked off the flight without refunds.