Examine the historical continuity and operational divergence between the modern Directive Principles and their colonial predecessors:
1. The historical predecessor, known as the 'Instrument of Instructions', was originally codified within the Government of India Act of 1919.
2. The colonial instructions were directed exclusively at the administrative executive, whereas the modern directives instruct both the executive and the legislative branches.
3. The colonial instructions operated as fully enforceable legal mandates in court, whereas the modern Directive Principles are strictly non-justiciable.