a) Uma ususa isikulufu, asikho isidingo sokuhambisa noma ukuqaqa idivayisi yokushayela;

b) Uma ususa i-bearing ephakathi nendawo, asikho isidingo sokususa noma ukususa isikulufu;

c) I-bearing ephakathi nendawo ingagcotshwa ngaphandle kokuhlakaza umkhombe kanye nesembozo.