How to disable funds reservation for internal requisition ?

Below is the requirement :

There are two OUs, OU1 and OU2.

Common Items are procured by the central OU1 and stocked in a central warehouse.

Requester from OU2 raises a internal requisition for the item that is stored in the central warehouse.

Encumbrance is enabled at PR and PO level.

Questions ?

1. How to avoid budget checking and funds reservation for internal requisition ?

My idea is to have a charge account that is enabled for budget in the destination organization that is requesting ? Is it the right and best way ?

2. In what circumstances do internal requisition go thru funds reservation ?

Thanks