(1) "Medical payments coverage" includes any coverage in which the insurer agrees to reimburse the insured and others for reasonable and necessary medical expenses and funeral expenses incurred as a result of bodily injury or death caused by a motor vehicle accident, without regard to the insured's liability for the accident. Coverage shall be available to the named insured, resident spouse, and any resident relative while occupying the covered motor vehicle, and to any other person legally occupying a covered motor vehicle. Expenses must be incurred for services rendered within three years from the date of the accident; provided, however, that nothing shall prevent an insurer from allowing a longer period of time. Any rule or regulation promulgated which expands or conflicts with this definition shall be null and void.

(2) "Motor vehicle" means a vehicle having more than three load-bearing wheels of a kind required to be registered under the laws of this state relating to motor vehicles designed primarily for operation upon the public streets, roads, and highways and driven by power other than muscular power. The term includes a trailer drawn by or attached to such a vehicle and also includes without limitation a low-speed vehicle.

(3) "Owner" means the natural person, corporation, firm, partnership, cooperative, association, group, trust, estate, organization, or other entity in whose name the motor vehicle has been registered. If no registration is in effect at the time of an accident involving the motor vehicle, the term means the natural person, corporation, firm, partnership, cooperative, association, group, trust, estate, organization, or other entity who holds the legal title to the motor vehicle or, in the event the motor vehicle is subject to a security agreement or lease with an option to purchase with the debtor or the lessee having the right to possession, the term means the debtor or the lessee.

(4) "Self-insurer" means any owner who has on file with the Commissioner of Insurance an approved plan of self-insurance which provides for coverages, benefits, and efficient claims handling procedures substantially equivalent to those afforded by a policy of automobile liability insurance that complies with all of the requirements of this chapter.