OSHA is promulgating an interim final rule to update the procedures for handling and investigation of retaliation complaints under several whistleblower protection statutes. The updates would make the investigation procedures consistent among the statutes and make the process accessible for employers and employees by providing uniform standards with regard to various procedural issues including the sharing of the information between the parties during the investigation and the ability of the agency to serve findings by electronic means. Recent changes to the Pipeline Safety Improvement Act (PSIA) and the Wendell H. Ford Aviation Investment and Reform Act for the 21st Century (AIR21) resulting from the Consolidated Appropriations Act, 2021 will also be addressed. Promulgation of this procedural rule will aid OSHA’s efficient processing of complaints under the whistleblower statutes.