What is required for the countdown clock on an NJ Transit Mobile Ticket?

The requirement for the countdown clock on an NJ Transit Mobile Ticket is that it must be activated. When the countdown clock is activated, it indicates the remaining time until the ticket expires or the next train departure. This functionality is crucial for passengers to manage their time effectively and ensure that they board the train before their ticket becomes invalid.

An activated clock shows real-time information that allows riders to make timely decisions about their travel plans. Other states of the countdown clock, such as being hidden or set to zero, do not fulfill the functional purpose it serves for the user. Therefore, having the clock activated is essential for providing valuable information to the ticket holder.