Got this from earlier thread Requirement for 50:50 Cash & Collateral
Go to Effective deposits in that circular you will find like mentioned below:-
All collateral deposits made by CMs are segregated into cash component and non-cash component.
For Additional Base Capital, cash component means cash, bank guarantee, fixed deposit receipts, T-bills and dated government securities. Non-cash component shall mean all other forms of collateral deposits like deposit of approved demat securities.
At least 50% of the Effective Deposits should be in the form of cash.