Which date is the cost transaction date?

Summary:

Which date in the PO is the transaction date for cost data whose source is Oracle Fusion Purchasing?

Content (required):

The accounting date for project costs is the transaction date from the following document

https://docs.oracle.com/en/cloud/saas/project-management/23c/oapjc/how-accounting-and-project-accounting-dates-are-determined.html#s20072633

However, I do not know which dates of costs imported from other systems correspond to transaction dates.

Which date in the PO is the transaction date for cost data sourced from Oracle Fusion Purchasing?

Is it the date of receipt?

Or is it the system date linked to the project?

Version (include the version you are using, if applicable):