Period of Validity of Bid. Bids shall remain valid for 180 days after the date of opening of Financial Bid. • In exceptional circumstances, ADO ZP Xxxxxxxxx may solicit the Bidder’s consent to extend the period of validity. The request and the responses thereto shall be made in writing . The EMD provided shall also be suitably extended. However Bidder granting the request will not be required nor permitted to modify its bid. 12.