The 30 hour OSHA class is more appropriate for supervisors or workers with some safety responsibility. It provides more in-depth training on the recognition, avoidance, abatement, and prevention of safety and health hazards in workplaces in the construction industry. It also provides information regarding workers' rights, employer responsibilities, and how to file a complaint. It is taught by an Occupational Safety and Health Administration (OSHA) authorized instructor. Students receive a card acknowledging they have completed the class. OSHA cards do not expire. However, as per the New York City Department of Buildings, the card must have been issued within the past 5 years in order to work on any site.