(1) As used in this chapter, the following words and phrases shall have the meanings respectively ascribed to them:
(a) "Authorized emergency vehicle" shall mean any vehicle designated as such by KRS 189.910.
(b) "Wrecker" shall mean a motor vehicle on which a wrecking crane and other equipment suitable for motor vehicle wrecker service has been permanently mounted.
(2) Provided, however, that the regulations in reference to lights shall not apply to common carrier motor vehicles whose equipment is regulated by the rules of the Interstate Commerce Commission.
(3) As used in this chapter, a driver's license shall mean an operator's license issued pursuant to KRS 186.4102, 186.412, and 186.4121 and a commercial driver's license means a license issued pursuant to KRS Chapter 281A.