Required Field Desired on Initial Record Creation, but not on subsequent edits

I have a few multi-line text fields (tracking history) that when creating a new record in the table I want to be required.  But after initial creation, there may be subsequent edits to the record. For these subsequent edits, I don't want all required fields to require updates (specifically the tracking history ones are requiring me to update them, even if I have nothing to add).

For example...say I update the date on a record...should I also have to update the comments box, if I don't want to?

It seems there should be a way to only require the field on initial record creation...is this possible?

Thanks!