How to make a referenced tbl required?

[tcanelli]

Please see images. I have the related call log table in the caller’s form (form is based on a diff tbl) but need to make sure the callers don’t skip this. Is there a way to make it required so the form can’t be saved without an entry?

There is the potential for 4 entries in the call log - so it would need to be required each time the form is edited.