For Tier 2, Tier 3 and Tier 4 UCBs, while retaining the current capital adequacy framework, it has been decided to revise the minimum CRAR to _______ so as to strengthen their capital structure-

The correct answer is 12%.

Step-by-Step Explanation:
Under the revised regulatory framework for Urban Co-operative Banks (UCBs) issued by the Reserve Bank of India (RBI), UCBs are categorized into four tiers based on their deposit sizes and area of operations:
1. Tier 1: UCBs with deposits up to 100 crore rupees.
2. Tier 2: UCBs with deposits more than 100 crore rupees and up to 1,000 crore rupees.
3. Tier 3: UCBs with deposits more than 1,000 crore rupees and up to 10,000 crore rupees.
4. Tier 4: UCBs with deposits more than 10,000 crore rupees.

To strengthen the capital structure of these institutions:
- Tier 1 UCBs: The minimum Capital to Risk-Weighted Assets Ratio (CRAR) requirement is maintained at 9%.
- Tier 2, Tier 3, and Tier 4 UCBs: The minimum CRAR has been revised upward to 12%. This alignment is designed to enhance their financial resilience and align them closely with the capital requirements of commercial banks.

Therefore, while retaining the current capital adequacy framework, the minimum CRAR for Tier 2, Tier 3, and Tier 4 UCBs has been revised to 12%.