Ukubonelela ngolwazi lwemveliso enxulumene neshelufu, kubandakanywa ixabiso leshelufu yokubonisa ishelufu kunye nocaphulo, iinkcukacha zeshelufu zokubonisa ishelufu, ukuba uneshelufu yokubonisa iimfuno zokuthenga isambuku, wamkelekile ukuthenga iimpahla.