Identify which of the following constitutional directives are formally categorized by political scholars as 'Gandhian Principles' due to their reflection of the historical national movement's ideology:
1. The directive demanding the state secure and implement a uniform civil code across the entire national jurisdiction.
2. The directive mandating the organization and empowerment of self-governing village panchayats.
3. The directive instructing the state to actively promote and support the proliferation of local cottage industries in rural areas.
4. The directive requiring the state to secure a guaranteed living wage, reasonable leisure, and cultural opportunities for all industrial workers.