Amendment to Department Order No. 119, Series of 1991 Guidelines in the Holding of Simultaneous Bidding for Infrastructure Projects. Category: Department OrderSub Category: infra-projSeries: 1992No: 54File: DO_054_S1992.pdfDate: Friday, May 8, 1992Tags: Guidelines Simultaneous Bidding Infrastructure Proj 054 Read more about Amendment to Department Order No. 119, Series of 1991 Guidelines in the Holding of Simultaneous Bidding for Infrastructure Projects.