In TWC territory, trains are authorized to proceed through the limits of another train authorized to 'WORK BETWEEN' two specific points if ________.
1) The train is traveling at a slower speed than the train authorized to 'WORK BETWEEN'
2) The train has received permission from the train authorized to 'WORK BETWEEN'
3) The train is equipped with the necessary safety equipment
4) The train is on a different track than the train authorized to 'WORK BETWEEN'