An Unsolicited Proposal shall remain valid for a period of 18 (eighteen) months from the date of In-Principle Approval. A Formal Government Request must be issued within this period for the status of an Unsolicited Bidder to remain valid. Where a Formal Government Request has not been issued within the 18 (eighteen) month period and the Unsolicited Bidder has not been formally informed by the Contracting Authority that its Unsolicited Proposal has been rejected, then the Unsolicited Bidder must resubmit the Unsolicited Proposal within 1 (one) month of the expiry of the 18 (eighteen) month period, in order to secure the extension of a further 18 (eighteen) month period (starting from the date of expiry of the earlier 18 (eighteen) month period). The status of an Unsolicited Bidder shall remain valid if a Formal Government Request for the PPP Project is issued within that extended period.