After being put on hold by court orders, the Occupational Safety and Health Administration (“OSHA”) emergency temporary standard (“ETS”) mandating vaccination or weekly testing of employees of businesses with 100 or more workers is back in effect. On Friday, December 17, 2021, a panel of the United States Court of Appeals for the Sixth Circuit—randomly assigned to hear appeals of legal challenges to the ETS across the country—voted 2-1 to allow the ETS to go into effect. Given the uncertainty caused by ETS-related litigation, OSHA has extended enforcement deadlines. Employers will not be fined before January 10, 2022 for non-compliance with requirements other than the weekly testing provision—such as adopting a vaccination policy and determining the vaccination status of each employee—and will not be fined before February 9, 2022 for non-compliance with the weekly testing requirement, as long as the employer is “exercising reasonable, good faith efforts to come into compliance with the standard.”