The Cash Reserve Ratio (CRR) mandates that commercial banks must hold a specific percentage of their demand and time liabilities as reserves with the Central Bank, thereby safeguarding liquidity and enabling control over the money supply.
Option (C): This option is inaccurate as CRR is a compulsory and binding requirement for all commercial banks, as stipulated by Central Bank regulations.
Options (A), (B), and (D): These options are correct, accurately reflecting the nature of CRR and its function in monetary policy and credit management.