zionist participants in the world zionist congress are free to form "brit olamit" or zionist world unions (ideological groupings), which are somewhat like political parties. while israeli political parties can participate in the congress, "brits" are also organized and voted into the congress by non-israelis, making the congress a multinational deliberative body for the jewish diaspora. however, as "aliyah" has brought jews to israel from other countries, israeli representation in the legislature has increased at the expense of non-israeli jewish diaspora representation. a brit olamit (world union) must have representation in at least five countries to send a delegation to the congress.