Yenzelwe ngokukodwa ukusetyenziswa ngaphandle, ibhokisi enkulu yeposi sisisombululo solawulo lweepakeji esigqibeleleyo, esinika ukhuseleko lonyaka wonke kwiipakeji zakho ezibalulekileyo zeposi kunye neepakeji. Ngokhuseleko oluphezulu nolwakhiwo oluqinileyo, le bhokisi yeposi iya kuba ngumlondolozi weepakeji ogqibeleleyo.