Which procedure must occur prior to a verbal annulment of a Clearance Card Form K?

The correct procedure prior to a verbal annulment of a Clearance Card Form K is that the Clearance Card Form K must be presented. This requirement emphasizes the importance of having the physical document on hand to ensure all parties involved are referring to the same information. Presenting the form allows for verification of the details, such as the train's scheduled movements and relevant authorizations, which is critical in maintaining safety and operational integrity.

Without presenting the Clearance Card Form K, there is a risk of miscommunication or misunderstanding regarding the train's status, route, or requests for annulment. This step is part of ensuring that all procedural protocols are followed to uphold operational safety and communication standards within the railway system. It establishes a clear line of accountability and traceability for the decisions made regarding the clearance of train movements.