Several fireworks companies are suing over what they call Michigan's excessive insurance requirements under a new state law.
The companies sued Wednesday in Detroit federal court seeking to overturn a requirement to obtain $10 million in liability insurance in order to sell an expanded line of fireworks.
A state law that took effect this year allows the sale of more powerful fireworks such as firecrackers and other devices such as bottle rockets and Roman candles
The companies suing the state say the insurance provision is unconstitutional and favors larger companies that can afford the coverage, giving them an unfair advantage in the market.
A spokeswoman for Gov. Rick Snyder says the insurance level was appropriate given safety priorities with the expanded fireworks availability.