Question

what was the key change in Belgium to strenghten the federal principle in 1993?

Answer 1

As far as power sharing is concern one key or important change was made in the constitution of Belgium to reduce the powers of the central government before 1993

Answer 2

Before the constitutional reforms of 1993, the regional governments in Belgium were dependent for their existence and political power on the central government of the country. However in the constitution they gave regional government constitutional powers that were not dependent on the central government. Thus, Belgium effectively shifted from a unitary form to a federal form of government in the year 1993.