revise Engineering Rules and supporting procedures and training to:
1. include requirements for multiple work groups within Conditional Stop Board Protection
2. define procedures to be followed when protecting multiple work groups, such procedures to include repeat-back requirements similar to those used in issuing track warrants, and an auditable Site Control Sheet to be held by the person in charge covering all approved work groups within the protection
3. structure the Site Control Sheet to allow such key information as:
• the time a particular work group is authorised to work on a line or lines, and the person authorised
• the time at which each work group reported clear of a line or lines, and the person reporting
• the time at which particular trains are authorised to pass the Conditional Stop Board
• whether work groups are authorised to resume on-track work on any line after the passage of any train
to be entered
4. enforce a cutoff for planned work which may be carried out under Conditional Stop Protection to that pre-planned and defined in the bulletin.