No Pay can only occur if the employee works a "crossover" shift. If the employee is not scheduled for a "crossover" shift, a No Pay instance cannot occur.
A crossover shift occurs when the employee is scheduled to begin work on one day and ends work on the next day. For example, the employee is scheduled to work 6:30 PM until 7:00 AM the next morning. The employee must be scheduled to begin work before Midnight (6:30 PM) and to end work after Midnight (7:00 AM the next morning) for a No Pay instance to occur.