Account assignment - WBS Element Responsibility

Hi,

I have searched MM, PS & FI forums for an answer to this but found nothing.

In Purchase Requisition, cost can be allocated to a project/WBS element (account assignment). When PR goes for approval it will always go to the person presponsible for the project and not the individual responsible for the WBS element.

Determination comes from table PROJ-VERNR.

How can I make the user responsible for the WBS element become the approver of the PR if they are responsible for the WBS element only and not the project itself.

Config done in CJ20N, OPS6.

Is there a standard way to configure this or perhaps user exit?

Thank you,

Kind Regards,

Will Conlon