What should a train do when it enters a block with no governing signal according to procedures?

Moving at restricted speed until the leading wheels have passed the next governing signal is the appropriate action when entering a block with no governing signal. This procedure is essential for ensuring safety and allowing the train operator to respond to any unforeseen circumstances. Restricted speed permits the train to operate safely in a potentially uncertain situation, providing the ability to stop within half the distance of the train's sighting distance.

This precautionary measure safeguards against other trains on the same track, structural hazards, or any objects that may not be visible ahead. By following this rule, the crew maintains control and situational awareness as they proceed through an area lacking clear signals, enhancing overall operational safety.