The United States' three largest airlines said they are in the process of amending their systems to address Chinese requests over how they refer to Hong Kong, Macau and Taiwan, after Chinese state media reported that they had yet to complete revisions before yesterday's deadline.
The Global Times newspaper singled out Delta Air Lines, United Airlines, American Airlines and Hawaiian Airlines in a report which said the companies had yet to meet requirements set by China's aviation regulator.
China has demanded that foreign firms, and airlines in particular, do not refer to Taiwan as a non-Chinese territory on their websites, a demand the White House slammed in May as "Orwellian nonsense." The Civil Aviation Administration of China has been pushing airlines to make the change.
It is unclear how China might punish airlines that do not comply with its requests, but in December it added a clause to rules governing foreign airlines in the country, saying regulators could change a company's permit if it did not meet "the demand of public interest".