About UCC FCCB is a member of the United Church of Christ, a progressive denomination with a deep and proud history in the United States. Several denominations merged in the middle of the 1900s to form the denomination, including Congregational Church, which explains our name. The denomination is divided into conferences. FCCB is part of the Northern California Nevada Conference which includes over 120 churches. Each conference is then divided into associations. We are a member of the Bay Association. The United Church of Christ practices congregational polity which means that most major decisions are made by individual churches rather than by higher authorities in the church. Our relationships with other UCC churches around the country and in other parts of the world are covenantal and based in mutual respect and trust.