These permissions are set by library.
Please contact your library
No the permissions are not set by library. I have been in contakt with the library, they spent over one hour to help me. No result!
Please check the following things:
1. Open the file in Adobe Digital Editions.
2. Go to File -> Item Info
Check under permissions, Viewing permission
If it is set to "on any device", then you will be allowed to copy the book.
If it set to "single device", then copying book to other devices is not allowed.
Your library only can make changes in this case.