Minnesota’s UST Operator Training Rules went into effect on May 18, 2010. The good news for operators is the deadline has been officially pushed back one year. Operators at UST facilities where the facility telephone area code is 651, 952, 612, or 763 must pass the examination no later than August 8, 2011. Operators at UST facilities where the facility telephone area code is 507, 218, or 320, or other area code must pass the examination no later than August 8, 2012.