gration is the chosen approach to some of these issues, there also needs to be Preservation 
Policies on what triggers a migration and what types of migration are expected to solve the 
preservation risk identified. The preservation strategy will describe the range of activities 
that need to be done in case of a migration. 
4.3.2 The repository shall have mechanisms in place for monitoring its preservation 
environment. 
Supporting Text 
This is necessary so that the repository can react to changes and the