The copy threshold option contains SOM 1254, used to apply to individual storage systems and SOM 1260 used to apply to individual CLPRs..
Application to individual storage systems (SOM 1254)
This option applies to the entire storage system without considering CLPRs.
Application to individual CLPRs (SOM 1260)
This option can be applied only to the specified CLPRs. If the storage system contains volumes on which the copy suppression is allowed and not allowed, you can limit the target volumes for the copy suppression by classifying the volumes using CLPRs.