Which of the following must occur before passing a Stop indication at a manual interlocking?

The requirement to receive authority from the control operator before passing a Stop indication at a manual interlocking is crucial for maintaining safety and order within the rail system. This procedure is in place to ensure that the conductor is properly informed of the track conditions and any potential hazards that may not be visible from their location.

Authorizing a movement past a Stop indication allows the conductor to receive specific instructions about the status of the tracks, upcoming trains, and any other operational considerations that may affect the journey. This communication acts as a safeguard to prevent accidents and ensure the safe movement of trains through potentially hazardous areas.

In contrast, waiting for the next train to pass, performing compliance checks, or proceeding only on verbal authority without appropriate consent does not adhere to the established protocols. These actions could create confusion or compromise safety by bypassing the critical step of receiving explicit authorization from the control operator, who has the comprehensive oversight needed to grant such authority safely.