According to the Missouri DOR Driver’s Licensing Division, Implied
Consent means that “under this law, a driver (by driving),
automatically agrees to take a test to measure blood alcohol
concentration when stopped (under 21 years old), under arrest (age 21
and over), and suspected of driving under the influence.” If a
driver who is suspected of a DWI refuses a Breathalyzer, Blood or Urine
Test, their license will be revoked for 1 year.