The Contractor shall, before executing or signing the Contract submit to NIA a credit line issued by an authorized bank/financing institution in an amount which is equal to the average operating expenses of the project for two (2) months or ten percent (10%) of the approximate total project cost whichever is less, or a cash deposit certificate in the amount specified in the foregoing. In the case of a cash deposit certificate submitted by the winning bidder, withdrawal of said cash deposit shall be subject to the approval of NIA.