Manage Moodle Assignment Submissions

Group submission settings - You will need to create groups in Course Site but a group can submit a single file.  Faculty then give one grade that is delivered to all group members. 

See Additional Information here on Setting up Course Site Groups.

Note - The Notifications drop-down will appear blank if "Students submit in groups" is set to No. Once you switch that menu option to Yes you'll see the Notification settings.

Restrict Access - This setting allows faculty to hide and make available content on a specific day/time and for a specified amount of time.

Note - Restrict Access is NOT the due date.  Due date is set up in availability.