Mormonism assigns considerable authoritative status to church tradition and ecclesiastical leadership. Male members of the church who meet standards of worthy behaviour and church participation are generally ordained to specific offices within the priesthood. It reflects Mormon society’s Patriarchal system. These are not full time roles but assigned to men who fulfill certain criteria. There are several levels - the Aaronic priesthood is conferred upon male church members beginning at age eleven. Previously it was not permissible for non-whites to become priests. Children from a same-sex marriage are still barred. To receive the Melchizedek priesthood in the church today, the recipient must hold the Aaronic priesthood and be at least 18 years old.