How have the Centre-State relations been restructured to strengthen federalism?

How have the Centre-State relationsbeen restructured to strengthen federalism?
Ans. For a long time, the Central Government misused the constitutional power to dismiss State Governments that were controlled by the rival parties. But the rise of regional political parties in many states has changed the Centre-State relations. All this changed significantly after 1990.
This was the beginning of the era of coalition governments at the centre. Since no single party got a clear majority in the Lok Sabha, the major national parties had to enter into an alliance with many parties including several regional parties to form a government at the centre. It led to a new culture of power sharing and respect for the autonomy of State Governments. This trend was supported by the Constitution and made it difficult for the Central Government to dismiss any State Government in an arbitrary manner.