1. Lub tshuab formwrok phab ntsa yog siv rau txhua hom phab ntsa thiab kem, nrog kev ruaj khov thiab kev ruaj khov ntawm qhov hnyav tsawg.
2. Xaiv tau cov ntaub ntawv uas zoo tshaj plaws rau koj cov kev xav tau - piv txwv li rau cov pob zeb du thiab tiaj tus.
3. Nyob ntawm seb lub zog ntawm cov pob zeb xav tau npaum li cas, cov nqaj hlau thiab cov hlau yuav tsum sib nrug ze dua lossis sib nrug. Qhov no ua kom muaj kev tsim qauv zoo tshaj plaws thiab siv cov khoom siv tau zoo tshaj plaws.
4. Muaj peev xwm sib sau ua ke ua ntej ntawm qhov chaw lossis ua ntej tuaj txog ntawm qhov chaw, txuag lub sijhawm, tus nqi thiab qhov chaw.