Uninsured motorist bodily injury coverage is usually sold in amounts that mirror the liability insurance you bought. For example, if you purchased a policy with $50,000 per person bodily injury liability coverage, up to $100,000 per accident, you would buy UM coverage in the same amounts. If you buy less than what you carry as liability coverage, an insurer typically will require you to sign a waiver noting that you were offered the higher amount. Liability insurance is mandatory in all states except New Hampshire, and each state sets its minimum liability requirements.