This ruling required districts to be reassessed after every census and to be based on roughly equal population, rather than geography (such as counties). Under redistricting, residents in urban areas were to gain an equitable share of apportionment in both houses in every state. Vermont and some other northern states had long been dominated by rural districts, as were several Southern states in those years, who had not redistricted since the turn of the century. Until that time, apportionment of upper houses was often based on county jurisdictions, which had given more power to rural counties and failed to acknowledge the increased population in urban areas. This arrangement had meant that urban areas did not have proportionate political power and often suffered from underinvestment in needed infrastructure; other urban issues were also neglected by rural-dominated legislatures.