Daim npog ntsej muag pov tseg Qhov zoo: 3 txheej ntawm kev pom, tsis muaj ntxhiab tsw, cov khoom siv tiv thaiv kev ua xua, ua pa zoo.
Daim npog ntsej muag 3-txheej pov tseg tau zoo tiv thaiv kev nqus ntawm plua plav, paj ntoos, plaub hau, khaub thuas, kab mob, thiab lwm yam.. Haum rau kev tu txhua hnub, cov neeg tsis haum, cov neeg ua haujlwm pabcuam (kuaj kho mob, kho hniav, saib xyuas, catering, tsev kho mob, kev zoo nkauj, ntsia thawv, tsiaj, thiab lwm yam), nrog rau cov neeg mob uas xav tau kev tiv thaiv ua pa.