As these institutions derives its powers, duties and responsibilities directly from the constitution, which is harder to be amended by legislature compared to sub-constitutional laws, their status is rather more stable and independent than institutions created by sub-constitutional laws.
[1] Modern constitution such as South African constitution creates various government institutions directly by itself, which has similar role as independent agency in classic government structure.
This so called 'Chapter nine institutions' of South Africa are explained as constitutional attempt to guarantee accountability of government, yet there are also worries as these new 'constitutionally independent' agencies can create tensions inside separation of powers between traditional branches and institutions of South African government.
[2] These modern independent agencies created directly by constitution sometimes fails to achieve its expected role, as their level of institutional independence varies according to specific political situations.
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