- For FERC-approved books, see Electric Tariff Books page.
- For rate Books provided by utility, refer questions to the utility per contacts listed on utility web page, or MPSC Addresses and Contacts page.
- Contact MPSCTARIFF@michigan.gov for further information.
- Rate Books may not yet reflect PSCR Factors that are pending MPSC approval.
- Rate Books may not yet reflect changes approved by recent MPSC orders. See MPSC Electric Orders page for orders issued in past few months. To search for proposed Rate Book changes that are not yet approved, search MPSC Case Index under utility name (in quotes) using keywords such as rate, electric, tariff, and rule.
- Rate Books include requirements based on MPSC administrative rules. See also Administrative Rules and Guidelines.
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