User based license is applicable or not for BPM & BRM process in SAP PO ?

Dear Experts,

We have been procured now SAP PO license for various purpose. We came to know, SAP PO consist of PI, BPM & BRM components after this Purchase.

My question is, if we want to implement BPM & BRM process, the existing ECC license is sufficient or we need to procure any user based license separately?

Thanks

R Vaithiyanathan