The Subic Bay Metropolitan Authority (SBMA) has once again extended its preparations for the Swiss challenge of the ₱6.2-billion Subic Bay International Airport (SBIA) project, aiming to ensure that the bidding process upholds fair competition.In a bid bulletin, the SBMA’s Pre-qualification, Bids, and Awards Committee (PBAC) announced that the issuance of instructions to challengers and other tender documents has been pushed back to June 30 from…