1. Uru rukurikirane rukoresha igishushanyo gishya kandi cyigenga, isura yagiranye amasezerano na siporo.
2. Urukurikirane rwose rwibishushanyo ruhuye nihame ryubwubatsi bwumuntu;
3. Moderi zose zikoresha imiyoboro ya oval ishimangiwe kugirango umutekano wibicuruzwa;
4. Uru ruhererekane rurimo kumanika ibikoresho byamahugurwa, inkunga yo guhugura, imyitozo ngororamubiri, intebe nibindi bikoresho, byateguwe kubuzima bwiza busabwa nubushakashatsi bwabakoresha niterambere, bihuza namahugurwa akomeye;
5. Buri bikoresho byashizweho kugirango byuzuze ibikoresho byawe bigenewe ibikoresho, bishobora guhinduka cyangwa imikorere yibikoresho byinshi byamahugurwa.