MI HB6305

Prohibits charging excessively increased prices for gasoline, propane, and home heating oil during or after a market disruption, defined as any change in the market resulting from weather, energy production failures, strikes, civil disorder, or other abnormal conditions.

Defines "excessively increased price" as any price increase exceeding 20% compared to pre-disruption prices, unless the seller can demonstrate the increase reflects higher costs of bringing the product to market or an extraordinary pre-disruption discount.

Establishes civil remedies allowing the Attorney General to bring class actions for actual damages or $100 per person (whichever is greater) and to seek injunctive relief and civil fines up to $10,000 per violation for individuals and $1,000,000 for other persons.

Authorizes the Attorney General and local prosecutors to investigate violations through written demands for testimony, documents, and evidence, with court enforcement available for non-compliance.

Creates criminal liability for intentional violations, with misdemeanor penalties of up to 1 year imprisonment and $10,000 fines for individuals, and up to $1,000,000 fines for other persons.