S.C. Code § 56-5-2934
Notwithstanding any other provision of law, a person charged with a violation of Section 56-5-2930, 56-5-2933, or 56-5-2945 who is being tried in any court of competent jurisdiction in this State has the right to compulsory process for obtaining witnesses, documents, or both, including, but not limited to, state employees charged with the maintenance of breath testing devices in this State and the administration of breath testing pursuant to this article. This process may be issued under the official signature of the magistrate, judge, clerk, or other officer of the court of competent jurisdiction. The term "documents" includes, but is not limited to, a copy of the computer software program of breath testing devices. SLED must produce all breath testing software in a manner that complies with any and all licensing agreements. This section does not limit a person's ability to obtain breath testing software directly from the manufacturer or distributor.
S.C. Code § 56-5-2934