Question: what were the requirements to be a member of the sanhedrin?
Answer: Herodian and early Roman rule The Mishnah tractate Sanhedrin (IV:2) states that the Sanhedrin was to be recruited from the following sources: Priests (Kohanim), Levites (Levi'im), and ordinary Jews who were members of those families having a pure lineage such that their daughters were allowed to marry priests.