Is Missouri a Voluntary State Withholding for IRA distributions?

You may elect voluntary state income tax withholding. You must provide a specific percentage or dollar amount to be applied for state tax withholding.
AL, AZ, CO, CT, DC, GA, HI, ID, IL, IN, KY, LA, MD, MI, MN, MS, MO, MT, NJ, NM, NY, ND, OH, PA, RI, SC, UT, VA, WI, WV

So, whether the customer elects to have Federal Taxes or not, we are not required to withhold State? Any resourses?