We would like all of our borrowing requests to indicate CCL.

ILLiad automatically assigns CCG/CCL based on publication date, creating an error when a library also has a copyright entry in their OCLC Constant Data. This error has been discussed here: https://support.atlas-sys.com/hc/en-us/community/posts/360012493354-Easy-Fix-Copyright-fields-are-duplicated-in-ILLiad-when-using-a-constant-data-record-containing-copyright-data-resulting-in-an-error-message-

Libraries should be able to customize how CCL/CCG is applied to their requests, regardless of whether the request is filled through RapidILL, OCLC, or other means.