S.C. Code Ann. § 56-5-2933
It is unlawful for a person to drive a motor vehicle within this State while his alcohol concentration is eight one-hundredths of one percent or more. A person who violates the provisions of this section is guilty of the offense of Driving With An Unlawful Alcohol Concentration. A person may be charged for a violation of Section 56-5-2930 but prosecuted pursuant to this section if the original testing of the person's breath or collection of other bodily fluids was performed within two hours of the time of arrest and articulable suspicion existed to justify the traffic stop. This section does not apply to cases arising out of a stop at a traffic roadblock or driver's license checkpoint. A person shall not be prosecuted for both a violation of Section 56-5-2930 and a violation of this section for the same incident. A person who violates the provisions of this section is entitled to a jury trial and is afforded the right to challenge certain factors including, but not limited to, the following:
(5) whether the person consented to taking a test pursuant to Section 56-5-2950, and the:
(d) machine was working properly.
(2) any evidence that may corroborate or question the validity of the breath or bodily fluid test result including, but not limited to:
(4) any other evidence of the state of a person's faculties to drive which would call into question the results of a breath or bodily fluid test.
At trial, a person charged with a violation of this section is entitled to a jury instruction stating that the factors enumerated above and the totality of the evidence produced at trial may be used by the jury to determine guilt or innocence.
A person charged with a violation of this section must be given notice of intent to prosecute under the provisions of this section at least fourteen days before his trial date.
Nothing contained in this section prohibits the introduction of: