https://www.lexpera.com.tr/resmi-gazete/23-11-1981/17523 monthly 2026-10-30T14:34:15Z https://www.lexpera.com.tr/resmi-gazete/metin/istanbul-su-ve-kanalizasyon-idaresi-genel-mudurlugu-kurulus-ve-gorevleri-hakkinda-kanun-17523-2560 1981-11-23T00:00:00Z