https://www.lexpera.com.tr/resmi-gazete/17-12-1999/23909 monthly 2026-07-14T13:11:19Z https://www.lexpera.com.tr/resmi-gazete/metin/sosyal-sigortalar-kurumu-merkez-ve-tasra-teskilatinin-norm-kadrolarina-iliskin-yonetmelik-23909 1999-12-17T00:00:00Z