The First Labour Government was defeated in the and the incoming National Government changed the Electoral Act, with the electoral quota once again based on total population as opposed to qualified electors, and the tolerance was increased to 7.5% of the electoral quota. There was no adjustments in the number of electorates between the South and North Islands, but the law changes resulted in boundary adjustments to almost every electorate through the 1952 electoral redistribution; only five electorates were unaltered. Five electorates were reconstituted (including Rotorua) and one was newly created, and a corresponding six electorates were abolished; all of these in the North Island. These changes took effect with the . The electorate was again landlocked and much smaller than prior to its abolition. Significant settlements included Rotorua, Tokoroa, Taupo, and Mangakino, with Lake Taupo forming the southern boundary.