Security Profile Privileges for Primavera P6 v6.2

I need descriptions for the following Security Profile Privileges:

  1.  Level Resources:

  2.  Edit Period Performance:

  3.  Assign Issue Forms:

  4.  Edit EPS Except Financials:

  5.  Edit EPS Financials:

  6.  Perform Activity Resource Requests:

  7.  Create Workgroups:

  8.  Delete Workgroups:

  9.  Modify Project Workspace and Workgroup Preferences:

10.  Edit Contract Manager Project Link:

11.  Edit Future Periods:

Our Project Managers do not currently have these privileges and we want to know if it would be appropriate for them to have these privileges.