A library may become a member of DuPage Library System if it is able to:
- Maintain a library with
- A budget for library service
- At least one employee working a minimum of 15 hours per week
- A bibliographically-organized collection of materials which meets the basic needs of the primary users.
- Honor the Illinois Interlibrary Loan Code, the DuPage Library System's Bylaws, and Description of System Programs.