Sage 100

I added an expiration date UDF to Inventory lot distribution. Is there a way to restrict data entry to just Inv Receipts? I'd like to display the UDF for Transfers, Issues and Adjustments but I don't want someone overriding the date. Since this form uses Common Entry, it doesn't look possible though.

UDS post-validate on the field, checking the transaction type? It might be tricky with it being the lot table instead of normal line data. Or maybe a panel event script to set the field to read only unless it is a Receipt?