0 - Merge the Administration ECL from the home server specified in the Location document. The resulting workstation ECL will have all entries specified in the Administration ECL, and any entries that were in the workstation ECL but not in the Administration ECL. Any entries that were in both will be overwritten by the entries in the Administration ECL.
3 - No specific action is necessary. This is the default setting after initial client setup.
This variable won't be supported past r5.