Section 29: Validity of Period Bids, Modification and Withdrawal of Tenders.

(1) The period of validity for a bid shall be the period specified in the tender documents.
(2) A procuring entity may request suppliers or contractors to extend the period of validity for an additional specified period of time.
(3) A supplier or contractor may refuse the request for the extension of bid, in which case the effectiveness of its bid will terminate upon the expiration of the unextended period of effectiveness.
(4) A supplier or contractor may modify or withdraw its bid prior to the deadline for the submission of bids.
(5) The modification or notice of withdrawal is effective if it is received by the procurement entity before the deadline for the submission of tenders.