1. Kwerekana: yashyizwe muri OPB, akadomo gatukura matrike yerekana, guhuza amajwi ya sitasiyo, ibikorwa byitumanaho.2. Nta kwerekana: yashyizwe muri OPB, ihuza amatangazo yijwi hamwe nibikorwa byitumanaho rya buto.