It is the owner's responsibility to ensure that staff take regular breaks to ensure that fatigue does not downgrade their ability to operate an incident-free operation. If continuous operation is planned, then backup staff must be available to allow adequate breaks to occur.
S.C. Code Ann. § 52-19-300
Staff breaks; backup staff
1994 Act No. 408, SECTION 30, eff 60 days after May 24, 1994.
Official source: South Carolina Legislature. Reproduced from public-domain South Carolina statutes; confirm against the official source for the current text. Not legal advice.