Any licensed operator, being twenty years of age or older and having had an operator’s license to operate a motor vehicle of the same class as the motor vehicle being operated for at least four years preceding the date of such instruction, may instruct a person sixteen or seventeen years of age who holds a youth instruction permit issued in accordance with subsection (c) of section 14-36, or a person who is eighteen years of age or older who holds an adult instruction permit, in the operation of a motor vehicle. Any person so instructing another in the use of any motor vehicle shall be responsible for the operation thereof. Violation of any provision of this section shall be an infraction.