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All employers covered by the Act are regulated by Part 1904 regulations. However, businesses with 10 or fewer employees and businesses with certain industry classifications are partially exempt from keeping OSHA injury and illness records, unless OSHA or the Bureau of Labor Statistics notifies them in writing that they must do so. All employers covered by OSHA—no matter the number of employees or industry classification—must report to OSHA any workplace incident that results in a fatality or the hospitalization of three or more employees.