Izinkampani zokubonisa okuhambisana nokuthuthukiswa kwesikhathi sokusebenza kanye nokubonisa okuhambisana nokuthuthukiswa kwesikhathi sokusebenza kuyisimo esezingeni elilodwa elilungiselelwe yiBritish Standards Institute kanye neDet Norske Veritas ngo-1999, okuyisimo esezingeni esimiso. Isimo sokuqinisekisa okuhambisanayo nge-0HSAS18001 kuyisimo esezingeni esimiso elilungiselelwe izinkampani ukwenza izinkampani zokubonisa okuhambisana nokuthuthukiswa kwesikhathi sokusebenza. Kuyisimo esikhulu futhi kuyisimo esezingeni lokwenza izinkampani zokwenza izinkampani zokubonisa okuhambisana nokuthuthukiswa kwesikhathi sokusebenza. Ngo-Novemba 12, 2000, iChina yayiqinisekisa isimo esezingeni GB/T28001-2001 idt OHSAS18001:1999 "Occupational Health and Safety Certification". Ngo-Disemba 20 kwalesoskhathi, iKomishoni yasekuqaleni kanye nezomnotho yasekuqaleni yayiqala i "Occupational Safety and Health Management System Audit Specification" kanye nezindawo zokubonisa okuhambisana nokuthuthukiswa kwesikhathi sokusebenza eChina.