Izimpawu zokuphepha ziyithuluzi elibalulekile lokuqinisekisa ukuphepha nobuqotho bezimpahla nemikhiqizo ngesikhathi sokuthuthwa nokugcinwa kwazo. Lezi zimpawu zinikeza izinzuzo eziningi ezibalulekile kumabhizinisi nezinhlangano ezifuna ukuvikela izimpahla zazo nokugcina ukwethenjwa kwamakhasimende azo.