How must movements be notified about the limits of the out-of-service track?

The correct response is that the limits of the out-of-service track must be communicated through a Bulletin Order or Form D line 4 or line 13. This method is part of the established procedural framework that ensures all employees operating on the rail network are fully aware of the conditions affecting the tracks. Bulletin Orders and Form D are formal means of communication that provide vital information, including safety measures, operational changes, and details on track status.

This approach is essential because these documents are designed to convey critical operational details in a standardized format that can be reliably referenced by authorized personnel. By utilizing these documents, any confusion or miscommunication that could arise from more informal means of communication, such as verbal announcements or personal interactions, is minimized.

In contrast, using verbal announcements or personal communication with the Dispatcher may not provide a permanent record or the formal notification required, which is especially important during high-stakes scenarios where safety is paramount. Additionally, relying solely on automatic signals does not encompass the necessary context or detailed information about the out-of-service limits, which are critical for safe rail operations.