Occupational Safety and Health Administration (OSHA) is promulgating procedures for the handling and investigation of retaliation complaints pursuant to section 31307 of the Moving Ahead for Progress in the 21st Century Act (MAP-21). This section protects employees from retaliation by motor vehicle manufacturers, part suppliers, and dealerships for providing information to the employer of the U.S. Department of Transportation about motor vehicle defects, noncompliance, or violations of the notification or reporting requirements enforced by the National Highway Traffic Safety Administration or for engaging in related protected activities as set forth in the provision. Pursuant to this statute, the rules set forth the procedures for handling and investigating retaliation complaints, including a statutory "kick-out" provision allowing the complainant to file the complaint in district court if the Secretary of Labor has not issued a final decision within 210 days of the filing of the complaint. Promulgation of a regulation is necessary to govern whistleblower investigations conducted under this new statute.