If an employee reports to work early and waits for his shift to begin, this is also not hours worked. Rest periods of five to 20 minutes are counted as time worked. Bona fide meal periods of 30 minutes or longer are not worktime. Training directly related to the employee's job is considered worktime. Normal travel to or from home and work is not worktime.
Travel required by work is worktime.
Despite the time when it may be performed, any work which an employee is required to accomplish while traveling must be counted as hours worked. Agency heads may award state comp time for travel hours outside of scheduled working hours. Usually DOL only investigates after they are notified of a possible violation. A second conviction may result in imprisonment. The Internet is a good source for lots of material.