No collision damage waiver subject to this chapter shall contain an exclusion from the waiver for damages caused by the ordinary negligence of the lessee or shared vehicle driver, as defined in § 46.2-1408. Any such exclusion in violation of this section shall be void. This section shall not be deemed to prohibit an exclusion from the waiver for damages caused intentionally by the lessee or shared vehicle driver or as a result of his willful or wanton misconduct or gross negligence, driving while intoxicated or under the influence of any drug or alcohol, or damages caused while engaging in any speed contest.