; (2) once such technology described in paragraph (1) is available, establish a requirement for the technology to be installed on aircraft operating under part 121 of title 14, Code of Federal Regulations, landing at airports within Class B and Class C airspace and certified under part 139 of title 14, Code of Federal Regulations; (3) in establishing the requirement as described in paragraph (2), consider any relevant findings identified pursuant to section 334 of the FAA Reauthorization Act of 2018 ( Public Law 115–254 )