NAB default row view on person form

Never mind - It’s got something to do with the $Person_Main or the $Person_Detail fields (or both…)

I ran an agent on documents in a test copy of my NAB. I noticed after the agent ran the default row displayed on the person form changed from the Basics Tab to the Administration Tab. Does anyone know what is controlling this ? The table properties are to switch rows programmatically but I don’t see what or where it is being controlled.