Turn off option to Authorise and Generate Order from Workspace Requisition Approvals

We would like the ability to be able to turn off the authorise and generate order from the workspace requisition approvals screen. Even if a user has the ability to do this removed from their user access profile they are still able to do this from in the workspace, for us all orders are to be checked an created by the finance team before they are approved to ensure the correct supplier is selected and also the correct coding is allocated to the order.