Legal Authority

The statutes, administrative rules, and jurisdictional framework that govern the Michigan Public Service Commission.

Primary Statute: Act 3 of 1939

Act 3 of 1939 (MCL 460.1 et seq.) is the law that created the Michigan Public Service Commission and gives it authority to regulate public utilities in Michigan. Originally enacted February 15, 1939, it replaced the prior Michigan Public Utilities Commission and remains the MPSC's enabling statute today.

Key Sections

Section	What It Does
MCL 460.1	Creates the MPSC. Three members appointed by the governor with Senate confirmation. No more than two from the same political party. Staggered six-year terms.
MCL 460.6	Core jurisdictional grant. Gives the MPSC authority to regulate rates, fees, charges, and conditions of service for electric, gas, telecommunications, and pipeline utilities.
MCL 460.6a	Rate regulation. Commission approval required for rate increases. Establishes notice and hearing requirements, temporary orders, and revenue decoupling mechanisms. Rate cases must be decided within 10 months.
MCL 460.6h	Gas Cost Recovery (GCR). Requires gas utilities to file annual GCR plans with five-year forecasts. Provides for monthly revenue statements and annual reconciliation proceedings.
MCL 460.6j	Power Supply Cost Recovery (PSCR). Same structure as GCR but for electric utilities. Annual plan filing with five-year forecast.
MCL 460.6s	Certificate of necessity. Required for construction of electric generation facilities rated at 225 MW or greater. The Commission must decide within 270 days of filing.
MCL 460.6t	Integrated Resource Plans (IRPs). Rate-regulated electric utilities must file long-range plans covering demand forecasts, generation technology, projected fuel costs, and renewable energy. Added by PA 341 of 2016, amended by PA 231 of 2023.

Read the full text of Act 3 of 1939 -- legislature.mi.gov

Key Legislation by Topic

The MPSC's authority derives from a series of statutes enacted and amended over more than 80 years. The table below catalogs the most significant acts.

Act	Year	Citation	What It Does
Public Utilities Act	1939	MCL 460.1--460.11	Creates the MPSC, grants regulatory authority over public utilities
Michigan Telecommunications Act	1991	MCL 484.2101--2604	Regulates telecommunications services, provider disputes, and licensing
Electric Transmission Line Certification Act	1995	MCL 460.561--575	Siting process for transmission lines over 5 miles at 345 kV or higher
Customer Choice and Electricity Reliability Act	2000	MCL 460.10--460.10ee	Retail electric competition, capped at 10% of utility sales
Clean and Renewable Energy Act	2008	MCL 460.1001--1232	10% renewable energy standard by 2015, energy optimization programs
Energy Law of 2016 (PA 341)	2016	Amends MCL 460	Integrated Resource Plans, 10-month rate case deadline, certificate of necessity
Energy Law of 2016 (PA 342)	2016	Amends MCL 460	15% renewable standard by 2021, updated energy waste reduction targets
Clean Energy Package (PA 235)	2023	Amends MCL 460	100% clean energy by 2040, 50% renewable by 2030, 2,500 MW storage target
Clean Energy Package (PA 231)	2023	Amends MCL 460	Updated IRP process with climate, environmental justice, and affordability factors
Clean Energy Package (PA 233)	2023	MCL 460.1221--1232	Voluntary renewable energy and storage facility siting certificates (1-year deadline)

The 10% Customer Choice Cap

Michigan allows retail electric customers to choose an alternative electric supplier (AES) instead of their default utility. However, this right is subject to a hard cap: no more than 10% of a utility's average weather-adjusted retail sales from the preceding calendar year may be served by alternative suppliers at any given time.

The cap was established by PA 141 of 2000 (the Customer Choice and Electricity Reliability Act) and affirmed without change by PA 341 of 2016. The relevant statutory provisions are codified at MCL 460.10 through MCL 460.10ee.

In practice, the cap is fully subscribed for Michigan's two largest utilities (Consumers Energy and DTE Energy). Customers who want to switch to an alternative supplier are placed on a waiting list and can only be served when capacity becomes available under the cap.

Why this matters

The 10% cap is one of the most consequential features of Michigan energy law. It limits competition and ensures that regulated utilities retain at least 90% of their retail customer base. Because the cap has been fully subscribed for years, it functions as a ceiling on retail choice rather than a floor. Any proposal to raise, lower, or eliminate the cap is a major policy fight.

Federal vs. State Jurisdiction

Utility regulation in Michigan is divided between the MPSC and several federal agencies. The dividing line turns on whether activity is interstate or intrastate, and whether it involves wholesale or retail transactions.

FERC (Federal Energy Regulatory Commission)

Interstate wholesale electricity transactions
Interstate electricity transmission
Interstate natural gas pipeline siting and rates
Wholesale natural gas rates

MPSC (State)

Retail electricity and natural gas rates
Distribution system regulation
In-state facility siting (generation, transmission, pipelines)
Consumer complaints and service quality

FCC (Federal Communications Commission)

Interstate telecommunications
Overlapping jurisdiction with the MPSC on some intrastate telecom matters, local service quality, and 911 service

PHMSA (Pipeline Safety)

Federal pipeline safety standards
The MPSC acts as the delegated state authority, inspecting and enforcing safety regulations for intrastate gas pipelines (and, by agreement, interstate gas pipelines in Michigan)

Key precedent: Schneidewind v. ANR Pipeline Co. (1988)

In Schneidewind v. ANR Pipeline Co., 485 U.S. 293 (1988), the U.S. Supreme Court held that a Michigan statute requiring MPSC approval before a natural gas pipeline company could issue long-term securities was preempted by the federal Natural Gas Act. The decision established that states may not regulate conduct in a field Congress has fully occupied with federal regulation. This case remains the leading precedent on federal preemption of state pipeline regulation.

Administrative Rules

The MPSC promulgates administrative rules under the Michigan Administrative Code, all in the R 460.* series. These rules provide the detailed operational requirements that implement the statutes described above.

Rule Range	Subject
R 460.101 et seq.	Consumer standards and billing practices for electric and gas residential service
R 460.701--752	Service quality and reliability standards for electric distribution systems
R 460.901a--1026	Interconnection and distributed generation standards (MIXDG rules)
R 460.2301 et seq.	Technical standards for gas service (metering, inspections, tests, records)
R 460.3101--3804	Technical standards for electric service (meter testing, customer records, data management)
R 460.10101 et seq.	Code of conduct for regulated utilities and alternative electric suppliers
R 460.20101--20606	Michigan Gas Safety Standards (natural gas pipeline safety)
R 484.601--75	Telecommunications rules (license transfers, unbundled network elements, local interconnection)

Full administrative rules catalog -- michigan.gov

2023 Clean Energy Package

The most significant recent change to the MPSC's statutory mandate. Governor Whitmer signed five bills on November 28, 2023, collectively establishing Michigan's clean energy transition framework.

PA 235 of 2023 -- Clean Energy Standard

50% renewable energy by 2030, 60% by 2035
100% clean energy by 2040 (80% by 2035)
Statewide energy storage target of 2,500 MW

PA 229 of 2023 -- Energy Waste Reduction

Updated energy waste reduction targets. Electric utilities must achieve annual energy savings of 1.5% of total retail sales from the previous year. Natural gas utilities must achieve 0.875% annually.

PA 231 of 2023 -- Integrated Resource Planning

Amended the IRP process (MCL 460.6t) to allow the MPSC to consider climate impacts, environmental justice, and affordability in long-term energy planning. These factors must now be weighed alongside reliability and cost when evaluating utility resource portfolios.

PA 233 of 2023 -- Renewable Energy Siting

Created a voluntary siting certificate process at the MPSC for utility-scale wind, solar, and energy storage facilities of "statewide significance." The MPSC must issue a final decision within one year of a complete application. Effective November 29, 2024. Does not confer eminent domain power.

PA 234 of 2023

Related energy provisions supporting the clean energy package.

Implementation Cases

The MPSC opened five implementation cases to develop rules and procedures for the new legislation:

U-21567 U-21568 U-21569 U-21570 U-21571

2023 Energy Legislation implementation workgroup -- michigan.gov

Sources and Further Reading

Michigan Compiled Laws (MCL) search -- legislature.mi.gov
Act 3 of 1939 (full text) -- legislature.mi.gov
MPSC Administrative Rules -- michigan.gov
MPSC Ratemaking -- michigan.gov
2023 Energy Legislation workgroup -- michigan.gov
2016 Energy Legislation workgroup -- michigan.gov

Disclaimer: This page is compiled from public sources for reference purposes. It is not legal advice. For authoritative statutory text, consult the Michigan Compiled Laws. For official MPSC rules and procedures, visit michigan.gov/mpsc.