How is budgetary control set up for project related expenses?

Summary:

We have set up budgetary control for our projects. When costs are charged to the project (miscellaneous costs, invoice distribution amounts, PO distribution amounts and requisition distribution amounts) and there is no available budget amount, a warning is raised. We have enabled expense items for projects. When an expense report item is tagged to a project that doesn't have available budget amounts, the expense report is approved without raising a warning. Is there a way to trigger this warning - just like it is triggered for invoiced, POs, reqs and miscellaneous costs?

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