There is a single Policy Document content type. There are multiple libraries in the Policy Center. We have one library called Corporate Policies that is managed globally. There are only 50 or so corporate policies. Then we have a library for each functional area that is secured so that only the "policy owners" for that function can update policies. All of the libraries use the same Policy Document content type. The Policy Center is not where policies are created, reviewed, approved, etc. so we do not have any workflows for approval. It basically provides a user-friendly way to search "convenience copies" of policies as they were being consolidated, updated, and revised. One of the reasons the Policy Center was created was that not all policies were in any one system - so it was created as a way to make sure that all critical policies could be found. We will likely re-visit the Policy Center in 2018 to assess the ongoing value.