1, Ifenisha ingahlukaniswa ibe yifenisha yasendlini yasendlini, ifenisha yasehhovisi kanye nefenisha yangaphandle ngokusho kwesimo sesicelo.
2, Ifenisha ingahlukaniswa ibe yifenisha yengane kanye nefenisha yabantu abadala ngokusho kwabasebenzisi.
3, Ifenisha ingahlukaniswa ibe yisihlalo, itafula, iKhabhinethi njll ngokusho kwesigaba somkhiqizo.
4, Izindlela zokuhlola kanye namazinga acashuniwe asuka ku-European Standard, okungukuthi BS EN-1728, BS-EN12520, BS-EN12521, BS EN-1730, BS EN-1022, EN-581, EN-1335, EN527.