D. No policy or contract of bodily injury or property damage liability insurance relating to the ownership, maintenance, or use of a motor vehicle shall be issued or delivered in the Commonwealth to the owner of such vehicle or shall be issued or delivered by an insurer licensed in the Commonwealth upon any motor vehicle principally garaged or used in the Commonwealth without an endorsement or provision insuring the named insured, and any other person using or responsible for the use of the motor vehicle with the expressed or implied consent of the named insured, against liability for death or injury sustained, or loss or damage incurred within the coverage of the policy or contract as a result of negligence in the operation or use of the motor vehicle by the named insured or by any other such person; however, nothing contained in this section shall be deemed to prohibit an insurer from limiting its liability under any one policy for bodily injury or property damage resulting from any one accident or occurrence to the liability limits for such coverage set forth in the policy for any such accident or occurrence or for any one person regardless of the number of insureds under that policy. Provided that, when one accident or occurrence involves more than one defendant who is covered by the policy, the plaintiff may recover the per person limit of the policy against each such defendant, subject to the per accident or occurrence limit of the policy. This provision shall apply notwithstanding the failure or refusal of the named insured or such other person to cooperate with the insurer under the terms of the policy. If the failure or refusal to cooperate prejudices the insurer in the defense of an action for damages arising from the operation or use of such insured motor vehicle, then the endorsement or provision shall be void. If an insurer has actual notice of a motion for judgment or complaint having been served on an insured, the mere failure of the insured to turn the motion or complaint over to the insurer shall not be a defense to the insurer, nor void the endorsement or provision, nor in any way relieve the insurer of its obligations to the insured, provided the insured otherwise cooperates and in no way prejudices the insurer. Where the insurer has elected to provide a defense to its insured under such circumstances and files responsive pleadings in the name of its insured, the insured shall not be subject to sanctions for failure to comply with discovery pursuant to Part Four of the Rules of Supreme Court of Virginia unless it can be shown that the suit papers actually reached the insured, and that the insurer has failed after exercising due diligence to locate its insured, and as long as the insurer provides such information in response to discovery as it can without the assistance of the insured.