Not sure what the law says in SC, but in Arizona it is asked for in the purchase contract but can be waived like any other condition.  It is rare lately to see a disclosure statement on property here.  I always make my seller fill it out, even if they have never inhabited the property.  Everybody knows something about a property, no matter how litttle that may be.  I also ensure my buyers are aware of what they are waiving by giving them a blank copy of the disclosure form.  Good luck.