S.C. Code Ann. § 40-29-340: Manufactured homes to meet certain criteria and be certified.

No person may sell or offer for sale a manufactured home manufactured after June 15, 1976, unless its components, systems, and appliances meet the criteria of compliance with the Construction and Safety Standards Act and have been properly certified by the Department of Housing and Urban Development. For the sale of a previously owned manufactured home, the buyer and seller shall sign a form certifying both persons have determined at least two functioning smoke detectors are in the home.