A rate contract is an agreement between a purchaser and supplier to supply items at specified prices during the period covered by the contract. No quantities are mentioned, but the contractor is bound to supply orders placed during the contract period at the specified rates. Rate contracts are generally concluded for standard items with annual estimated purchases of Rs. 25 lakhs or more that have stable pricing and are not subject to major market fluctuations. The decision to add or remove items is made by the Standing Review Committee which includes representatives from major procuring departments. Current rate contracts are evaluated based on contractor performance and market conditions to determine if items should remain on contract.