When an inspection report includes a deficiency that is alleged to be a building codes violation, the inspector is responsible for determining the construction dates and building codes in effect at the time of construction and must conduct the inspection using the building codes in effect at the time of construction.
Applicability of building code in effect at time of construction
S.C. Code Ann. § 40-59-620, under Title 40, Chapter 59.
S.C. Code Ann. § 40-59-620