Block - Payment terms and Baseline Date?

Hi SAP Experts,

We have a request to block the payment terms and baseline date for specific group of users on FB02 transaction.

(a vendor open line item).

I think this is not possible at all.

Unfortunately, I do not find any customizing solution to block this field using an authorization group.

We tried IMG: "Rules for document change" (this fields are not allowed due SAP design).

Do you have any idea to block this field to specific group of users?

I think I am gonna try a validation rule but I suspect I going to have the same result

Best Regards

Fernando Luna