S.C. Code Ann. § 25-1-1120

Whenever new units shall have been organized in the South Carolina Air National Guard at a location distant from previously organized units, newly created officer vacancies shall be tendered first to officers of the South Carolina Air National Guard residing in close proximity to the new unit commensurate with grade and qualifications and then to other applicants qualified for assignment and Federal recognition in accordance with appropriate regulations. After one year from the date of organization of the new unit, vacancies shall be filled by the selection and promotion procedures outlined elsewhere in this chapter for the Air National Guard.