2.1 Possession type and lead times

Different types of possessions, and their related lead times, have been developed to achieve the aims and
objectives described in this manual.
Possession types include;
1. Aligned possessions. These are possessions aligned with those of adjoining networks to ensure disruption to rail services is minimised.
2. Non-aligned possessions. These are possessions that cannot be aligned with a possession on an adjoining network and are classified as;
a. Primary possession – delays or cancellation of passenger services or mandatory freight paths will be required, or
b. Secondary possession – delays or cancellations will only affect ad hoc train paths.
3. Short notice works possession. This is a possession required to rectify an infrastructure problem that may, if not rectified, lead to deterioration of infrastructure and potentially threaten network service
continuity.
4. Emergency works possession. This is a possession imposed to rectify an urgent infrastructure problem that is threatening, or will threaten, network service continuity, or to address or remove a condition within the rail corridor that has the potential to escalate into a serious safety threat.