Well, apparently I'm not going to get an answer tonight. I will post this information that I found so I won't have to look it up again.
Title 47. Motor Vehicles
Chapter 10 - Accidents and Reports Relating to Accidents
Highway Safety Code
Section 10-104 - Duty to Give Information and Render Aid - Drug and Alcohol Testing
A. The driver of any vehicle involved in an accident resulting in injury to or death of any person or damage to any vehicle which is driven or attended by any person shall give his correct name, address and registration number of the vehicle he is driving, and shall upon request exhibit his driver license and his security verification form, as defined in Section 7-600 of this title, to the person struck or the driver or occupant of or person attending any vehicle collided with, and shall render to any person injured in such accident reasonable assistance, including the carrying, or the making of arrangements for the carrying, of such person to a physician, surgeon or hospital for medical or surgical treatment if it is apparent that such treatment is necessary or if such carrying is requested by the injured person. Any driver who provides information required by this section which is intentionally inaccurate shall be subject to the provisions of Section 10-103 of this title.
B. Any driver of any vehicle involved in an accident who could be cited for any traffic offense where said accident resulted in the immediate death or great bodily injury, as defined in subsection B of Section 646 of Title 21 of the Oklahoma Statutes, of any person shall submit to drug and alcohol testing as soon as practicable after such accident occurs. The traffic offense violation shall constitute probable cause for purposes of Section 752 of this title and the procedures found in Section 752 of this title shall be followed to determine the presence of alcohol or controlled dangerous substances within the driver's blood system.
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Oklahoma Statutes Citationized
Title 47. Motor Vehicles
Chapter 67 - Chemical Tests
Section 752 - Procedure for Blood Tests - Authorization - Liability for Withdrawal - Reports
B. If the person authorized to withdraw blood as specified in subsection A of this section is presented with a written statement:
1. Authorizing blood withdrawal signed by the person whose blood is to be withdrawn;
2. Signed by a duly authorized peace officer that the person whose blood is to be withdrawn has agreed to the withdrawal of blood;
3. Signed by a duly authorized peace officer that the person whose blood is to be withdrawn has been placed under arrest and that the officer has probable cause to believe that the person, while intoxicated, has operated a motor vehicle in such manner as to have caused the death or serious physical injury of another person, or the person has been involved in a traffic accident and has been removed from the scene of the accident that resulted in the death or great bodily injury, as defined in subsection B of Section 646 of Title 21 of the Oklahoma Statutes, of any person to a hospital or other health care facility outside the State of Oklahoma before the law enforcement officer was able to effect an arrest for such offense; or
4. In the form of an order from a district court that blood be withdrawn, the person authorized to withdraw the blood and the hospital or other health care facility where the withdrawal occurs may rely on such a statement or order as evidence that the person has consented to or has been required to submit to the clinical procedure and shall not require the person to sign any additional consent or waiver form. In such a case, the person authorized to perform the procedure, the employer of such person, and the hospital or other health care facility shall not be liable in any action alleging lack of consent or lack of informed consent.
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Oklahoma Statutes Citationized
Title 21. Chapter 20 Section 646
B. For purposes of this section "great bodily injury" means bone fracture, protracted and obvious disfigurement, protracted loss or impairment of the function of a body part, organ or mental faculty, or substantial risk of death.