Making fields mandatory in Supplier Master - OAF Page

Hi Team,

We are using Oracle EBS 12.2.9.

Our requirement is to make some fields mandatory in supplier master - OAF page.

And for this, we have enabled personalization and abled to make fields mandatory like supplier TRN #, Bank Name, Account Name, IBAN Number, etc.

However, the above is possible only if we go to that particular region link in supplier master.

If we don't click Banking Details Region link in supplier master for example, then system still allows to create and save supplier record.

Now my question is how we can make the entire region mandatory like: Bank Details, Business Classification etc. so that without entering this system should not allow me to create supplier and perform any transactions.