HDL - Importing Learning records for terminated employees at Offering level?

Summary:

We are looking for a way to import Learning records for terminated employees through HDL, at Offering level instead of Course level. Does anyone know if this is possible? We found this note in the Oracle documentation:

"You can load assignment completions for employees who are no longer active to Oracle Learning using one of these two methods:

• For courses that aren't in your learning catalog any more, load the completions using the ORA_LEGACY learning item type.
• For courses that are still in your learning catalog, load the completions using the ORA_COURSE learning item type."

Does this mean that we're not able to import at Offering/Activity level? If someone would be able to confirm, that would be great!