As used in this Chapter, the following terms shall have these prescribed meanings:
Physically driving or operating a motor vehicle.
A person is in an "intoxicated condition" when he/she is under the influence of alcohol, a controlled substance or drug, or any combination thereof.
Includes the definition of Law Enforcement Officer in Subdivision (17) of Section 556.061, RSMo., and military Policemen conducting traffic enforcement operations on a Federal military installation under military jurisdiction in the State of Missouri.