Currently all fields in the .csv are required. If some are not required we need that list.

[ChuckKollar]

Also, what happens if we make certain fields not required, and someone wants to edit the record at a later date? We have no provisions for that.

The document that describes the fields states which ones can be empty. The current validation code checks to make sure all of the other fields are present. An empty record is required for a "not required" field that is not specified.