New ILDS codes as of May 1, 2012
The new ILDS codes will be implemented as of May 1, 2012.
The new IHLS codes:
| New IHLS Codes | Previous Codes |
| ZCA - IHLS Carterville | SHLS - Shawnee Library System |
| ZCH - IHLS Champaign | LTLS - Lincoln Trail Libraries System |
| ZDE - IHLS Decatur | RPL - Rolling Prairie Library System |
| ZED - IHLS Edwardsville | LCLS - Lewis & Clark Library System |
| New RAILS Codes | Previous Codes |
| XBR - RAILS Burr Ridge | MLS - Metropolitan Library System |
| XCV - RAILS Coal Valley | PALS - Prairie Area Library System (Coal Valley) |
| XEP - RAILS East Peoria | ALS - Alliance Library System |
| XGV - RAILS Geneva | DLS - DuPage Library System |
| XRF - RAILS Rockford | PALS - Prairie Area Library System (Rockford) |
| XSW - RAILS Shorewood | PALS - Prairie Area Library System (Shorewood) |
| XWH - RAILS Wheeling | NSLS - North Suburban Library System |
The ILDS program asks that these codes not be used ahead of the implementation date.