As used in this Chapter, the following terms shall have these prescribed meanings:
Physically driving or operating a vehicle or vessel.
When a person is under the influence of alcohol, a controlled substance, or drug, or any combination thereof.
Driving while intoxicated, driving with excessive blood alcohol content, driving under the influence of alcohol or drugs in violation of a State law, County or Municipal ordinance, any Federal offense, or any military offense, or an offense in which the defendant was operating a vehicle while intoxicated and another person was injured or killed in violation of any State law, County or Municipal ordinance, any Federal offense, or any military offense.
Includes the definition of "Law Enforcement Officer" in Section 556.061, RSMo., and military Policemen conducting traffic enforcement operations on a Federal military installation under military jurisdiction in the State of Missouri.