How to track when a new location (Task) is marked as chargeable under an existing Project ID

Hi All,
Good Day. Hope you are doing well.

We are currently working on a requirement that involves tracking when a new location (Task) is marked as chargeable under an existing Project ID in Oracle Project Financial Management.

As an example, under a Project ID, a Task number was marked as chargeable last month for validation purposes. However, the "Last Updated" timestamp found in the About this Record section of the Project UI reflects all updates made to the Project ID and not specifically when the chargeable flag was enabled for a task. Our internal development team was unable to find a specific backend table or column that tracks when a task was set as chargeable.