Prerequisite: After rescuing the Moshae and after gaining access to the Aya city interior
Talk to Arbiter Renaav in the marketplace. You just need to find the marked datapads containing the angaran lawas and customs so you can download them to your omni-tool and get familiarized with them.
First, visit the governor’s office and talk to Ohmdaal in the reception desk. After talking to him, the datapad will appear on the table. Interact with it to update your objective.
Finally, head to the Resistance HQ and speak with Arbiter Vraagen first. Then, examine the datapad on the container near him to complete the task.