Ameren Missouri has filed an application with the Missouri Public Service Commission seeking to adjust the energy efficiency investment charge that appears on monthly electric bills. Ameren wants to adjust customer rates due to changes in its energy efficiency costs. The current monthly charge for a typical residential customer is $3.70 a month. Ameren seeks to increase that to $6.00, effective in February of 2015. Individuals have until December 14th to comment or submit an application to P.S.C. in order to participate in the case.