The basic Car Insurance Requirements in Maine are as follows:

Liability Insurance is a minimum requirement and a low cost car insurance option as long as the vehicle is not financed.

The liability Minimums are 50/100/25 (Bodily Injury and Property Damage)
50/100/25 Explained:

The first 50 represents $50,000, the maximum coverage for one person's injuries, $100,000 for the total coverage for all injuries sustained in one incident and last but not least $25,000 for the property damage maximum coverage amount.

Maine Car Insurance Laws:
Insurance proof is a requirement at registration and of course after an accident. The First Offense penalty is up to a $500 fine, suspension of license and registration for 30 days.