Eksistensi dan Kehujjahan Urf sebagai Sumber Istimbath Hukum

The science of Usul Fiqh developed along with the development Islam to various areas in Arabian Peninsula. Research by Fiqh, it is necessary because many cultures outside Peninsula, which are at odds local culture Of course, a requirement communities who do not know much about Islam. Therefore, clergy continue lot efforts resolve problems that exist. Where constituted several methods for formulation Islamic law addition "al-Quran", "Sunna", "Ijma’" and "Analogy" has been agreed upon both parties, namely al-urf. For Muslims, wherever they are, provisions Quran Hadith Prophet violated, customs can be declared valid. Legal ijtihadiyah derived from "custom" then set as where if source change, will also change. Compilation Law contains consideration used legal basis there was product fiqh marital property distinct different corpus jurisprudence Indonesia. basic example based on reality changes suit turn time, place, conditions. From here looks nature dynamic seen very clearly. Keywords : ‘urf, law, ijtihad