On selection of the preferred bidder, the authority notifies all who submitted final bids stating its decision and the preferred bidder. At this point, the Alcatel mandatory standstill period requirement means the authority must allow a 10-day standstill period before contract signature. This affords bidders the opportunity to request the reasons their particular bid was not selected and the authority must respond three days before the end of the standstill period. If there are no challenges during this period, the authority may proceed to contract signature.