; and (B) design enhancements (including flight deck alerts and indications), pilot procedures, and training requirements, are incorporated into such aircraft where needed, to minimize the potential for, and safety impact of, pilot actions that are inconsistent with manufacturer assumptions. (3) International regulators Notify international regulators that certify transport-category aircraft type designs (such as the European Union Aviation Safety Agency, Transport Canada, the National Civil Aviation Agency-Brazil, the Civil Aviation Administration of China, and the Russian Federal Air Transport Agency) of the requirements under subparagraphs (A) and (B) of paragraph (2) and encourage such regulators to evaluate the relevance of such requirements to their processes and address any changes, if applicable. (4) Development of tools and methods for validating assumptions (A) Development Develop robust tools and methods, with the input of industry and human factors experts, for use in validating assumptions about pilot recognition and response to safety-significant failure conditions as part of the aircraft design certification process. (B) Revision of regulations and guidance After the tools and methods have been developed as recommended under subparagraph (A), revise existing Federal Aviation Administration regulations and guidance to incorporate the use of such tools and methods and require documentation as part of the aircraft design certification process, including re-examining the validity of pilot recognition and response assumptions permitted in existing Federal Aviation Administration guidance. (5) Development and implementation of diagnostic tools (A) Development Develop design standards, with the input of industry and human factors experts, for aircraft system diagnostic tools that improve the prioritization and clarity of failure indications (direct and indirect) presented to pilots to improve the timeliness and effectiveness of their response. (B) Implementation After the design standards have been