Ngokusho kweNational Mine Product Safety Mark Center, imikhiqizo ethole uphawu lokuphepha idingeka ukuthi ivuselelwe lapho kuphela isikhathi sayo sokufaneleka.
Ukwehluleka ukuvuselela isitifiketi somkhiqizo kuholela ekungasebenzini kwaso okuzenzakalelayo. Ngenxa yalokho, imikhiqizo yezimayini enezimpawu zokuphepha zamalahle aphelelwe yisikhathi ayivunyelwe ukusetshenziswa.
Kuyafaneleka futhi ukuqaphela ukuthi isitifiketi sokuphepha kwamalahle kuvame ukuhunyushwa njengokuchaza amalungelo okukhiqiza kanye nobude besikhathi obunikezwe umenzi, esikhundleni sokubeka amalungelo okusetshenziswa komsebenzisi wokugcina ngemva kokuthenga. (Ukuze uthole izimiso ezinemininingwane, kuyatuseka ukuthintana noMnyango Wesayensi Yezemishini Nekagesi.)