in calculating the cost of Consumption, for a Consumption Register specified in Table 7.3.7.2 apply the charge_per_unit in the charge_table_element identified by corresponding Index specified in Table 7.3.7.2 of the unit_charge_active attribute of the corresponding Charge Object specified in Table 7.3.7.2; and
reject any instruction to set the unit_charge_passive attribute of a Charge Object in Table 7.3.7.2 that does not include all of the charge_table_elements specified in Table 7.3.7.2 for that Charge Object or contains charge_table_elements with values of index that are not in Table 7.3.7.2 for that Charge Object.
