and software that handle multiple critical functions. (4) The most common causes of airline computer network disruptions. (5) Industry best practices to prevent, and mitigate the impacts of, network disruptions. 4. Computer network resiliency (a) In general Any schedule change resulting from a computer network disruption, security breach, or other inoperability, may be considered an event within an air carrier’s control as determined by the Secretary of Transportation. (b) Computer network resiliency working group The Secretary of Transportation shall work closely with the airline industry computer network resiliency working group established under section 5 to improve computer networks for air carriers. (c) Final Rule Not later than 1 year after the enactment of this Act, the Secretary of Transportation shall publish a final rule that requires an air carrier operating under part 121 of title 14, Code of Federal Regulations, to submit to the Administrator of the Federal Aviation Administration a plan detailing, at a minimum— (1) the maintenance of computer network systems used to perform functions critical to the normal operation of the carrier