This document defines design guidance and certification recommendations for aircraft tolerance to interference from portable electronic devices. The aircraft design guidance and certification recommendations address all portable electronic devices, including transmitting portable electronic devices. The following changes have been introduced in this revision of the document: • TABLE 4-5 – Addition of PED emissions for radio altimeter band • TABLE 4-6 – Addition of MEF for PED in radio altimeter band • TABLE 4-7 – Addition of Target NIRA IPL values for radio altimeters • Appendix C – Derivation of Target NIRA IPL values for radio altimeters • Section 2.2.2 – Addition of reference to Appendix D for 5G PED transmitter risks for radio altimeters for IRA • Appendix D – 5G PED transmitter risks for radio altimeters compliant with RTCA DO-155 (1974).