Identify the procedural framework that justifies classifying the Indian Constitution as a 'blend of rigidity and flexibility':
1. The framework allows both the central Parliament and regional state assemblies an equal right to initiate constitutional amendment bills.
2. The framework dictates that the ordinary legislative power of the Parliament permanently supersedes its constituent amendment power.
3. The framework permits certain clauses to be altered via simple legislative majorities while mandating complex special majorities for core provisions.
4. The framework completely prohibits private members from introducing any constitutional amendment bills.