Certificate of Need
Certificate of Need (CON) is a state regulation requiring health practitioners to obtain prior approval from state regulators before offering certain medical equipment, such as MRIs and CT scanners, for use by patients.
This is an unverified list of states that do and do not require a Certificate of Need as of 2005. Check with an attorney on the current law in your state.
Also, the District of Columbia requires a Certificate of Need
States not requiring a Certificate of Need (as of 2005)