In CTC territory, who must authorize any movement on the main track where yard limits are in effect?

In a Centralized Traffic Control (CTC) territory, the control operator is responsible for authorizing any movement on the main track where yard limits are in effect. This role is critical because the control operator oversees the safe and efficient operation of rail traffic, ensuring that all movements are coordinated and comply with applicable regulations.

The control operator has the authority to issue clearances and manage train movements, especially in areas where yard limits can complicate operations. By regulating these movements, the control operator prevents potential conflicts between trains that may be entering or exiting the yard, thus enhancing safety.

Yard limits indicate zones where specific operating rules apply, and only a designated authority, such as the control operator, can manage these areas effectively. This centralized decision-making is vital for maintaining order and safety within the rail network. The other options, while involved in train operations, do not possess the authority required to authorize main track movements in these specific conditions.