Reltio L3 Layer -- Customer tenant
The L3 layer is yours to modify--its part of your Reltio tenant.
It's your party!
To start with, your L3 layer inherits the L2 and L1 configurations by reference, but then you decide what to change. You can customize the objects in L3 as a JSON file or in the Reltio Console. Then you can easily retrieve the configuration from the tenant, edit it, and apply it back to the tenant using the Configuration API.