WAEC Government 2020 Theory question 102

Any five: at least two levels of government (centre and units); constitutional division of powers (exclusive, concurrent, residual lists); written constitution; rigid constitution; supremacy of the constitution; independent judiciary/Supreme Court to settle disputes between levels; bicameral legislature, often with equal representation of units in the upper house; each level has its own sources of revenue; units cannot secede.

One short phrase plus one explaining sentence for each feature.