Iimbonakalo
1 Iiglasi zeglasi zilungelelaniswe ukuhlangabezana neemfuno ezahlukeneyo zokungena komoya.Ulwalathiso olwahlukileyo, ububanzi obuhlukeneyo bokungenisa umoya kunye nesantya sifezekiswa ngokulungelelanisa iingelosi zeglasi.
2 Ukusebenza kokukhanya okugqwesileyo.Iglasi yelouver ivumela umoya omtsha kunye nokukhanya ukuba kudlule, emva koko ukukhanya okugqwesileyo kunokufunyanwa ngaphandle kokuphazamisa umbono, yenza igumbi likhululeke.
3 Ukugcinwa lula.Iglasi yelouver kulula ukuyicoca, ibiza kancinci.
4 Ukusebenza kombono ogqwesileyo kunye nokusebenza komoya.