Revised program policy now requires OSHA trainers to limit worker training classes to a maximum of 7½ hours per day. Before OSHA made this change, there were no limitations on how long these classes could last each day. With 10 hours of training, along with necessary breaks and lunch, students could sit in classes for up to 13 hours a day. OSHA became concerned that long, mentally-fatiguing class days might cause students to miss essential safety and health training.

OSHA now requires outreach trainers to conduct 10-hour courses over a minimum of two days and 30-hour courses over at least four days. OSHA will not recognize training classes that exceed 7½ hours per day and will not provide course completion cards to instructors.  However, instructors may request (in writing) an exception to this 7½ hour requirement based on extenuating circumstances.