Which of the following is NOT a requirement when cab signals fail in 261 territory?

When cab signals fail in 261 territory, it is essential to understand the operational procedures in place to ensure safety. The specific requirement that is NOT mandated involves passing signals displaying "Restricting" as needed. This is because, in the event of a cab signal failure, trains are typically required to adhere strictly to fixed signals rather than operating under any discretionary actions.

In such situations, operators must follow the signals as they are displayed, which means they cannot pass a "Restricting" signal unless they are explicitly instructed to do so by a signal that allows for it under the current operating rules. Each of the other requirements ensures that the train operates safely and within the bounds of established speed limits and reporting protocols, maintaining communication with dispatch and adhering to fixed signal indications.

Overall, the correct response reflects the critical nature of adhering to signals in a safe manner during unusual circumstances like a cab signal failure.