(1) Requirement to maintain a live customer chat or monitored text messaging number Chapter 423 of title 49, United States Code, is further amended by inserting after section 42306 the following: 42307. Requirement to maintain a live customer chat or monitored text messaging number (a) Requirement (1) In general A covered air carrier that operates a domestic or international flight to, from, or within the United States shall maintain— (A) a customer service telephone line staffed by live agents