Complex sentence: With the introduction of the MMP electoral system after 1993, the rules regarding the Māori seats changed-today, the number of seats floats, meaning that the electoral population of a Māori seat can remain roughly equivalent to that of a general seat.
Split into simpler sentences: With the introduction of the MMP electoral system after 1993, the rules regarding the Māori electorates changed. Today, the number of electorates floats, meaning that the electoral population of a Māori seat can remain roughly equivalent to that of a general seat.