Create Blanket Po(FO, B) with reference to Outline Agreement(WK)

Hello MM Experts,

Does anyone know if something has changed to allow a Framework Blanket PO (doc type FO item category B) to be created with reference to a WK Outline Agreement?  I do not remember this being possible, but I am able to create a FO, B PO with referece to the value contract (wk) in ECC 6 EHP6.  (No Configuration changed!)

Also, I am trying to confirm if there is control for which types of documents and items categories can be created with reference to an wk contract. 

Thanks for your time!

Best Regards

Dawn

T