Regarding sabbatical leave policy

I need information about the sabbatical leave policy at TCS: 1. Am I allowed to take up a part-time job while on sabbatical leave? 2. If I receive the scholarship amount, can I repay it within a month and break the bond? 3. How long does it typically take for sabbatical leave to get approved? 4. Is it possible to resign while on sabbatical leave?