tokens: If the MPOO sends the bill for the temporary continuation of the metering point operations to the GO , the GO examines the bill . If the MSPO sends the bill for the temporary continuation of the measurement to the GO , the GO examines the bill . If the MSPO sends the bill for additional readings to the GO , the GO examines the bill . If the MPOO sends the bill for the equipment acquisition to the MPON or the GO , the MPON or the GO examines the bill . The GO or the MPON confirms the invoice with payment advice to the MPOO or the MSPO , or the GO or the MPON rejects the invoice of the MPOO or the MSPO .