Defaults for buyer: Info update

HI Experts

Default values for buyers are existing in system: 01 and 02.

For 01, Purchase order info update is A and for 02, it is C.

However I have not assigned parameter value to any of the user.

So, what would be the default for info update from PO.

Will it create PIR for Porg or for plant?

Warm regards

ramSiva