Local Government Code of 1991
Section 363. Publication of Call for Bids. - The call for bids shall be given the widest publicity possible, sending, by mail or otherwise, any known prospective participant in the locality, of copies of the call and by posting copies of the same in at least three (3) publicly accessible and conspicuous places in the provincial capitol or city, municipal, or barangay hall, as the case may be.
The notice of the bidding may likewise be published in a newspaper of general circulation in the territorial jurisdiction of the local government unit concerned when the provincial or city general services officer or the municipal or barangay treasurer, as the case may be, deems it necessary in order to obtain the lowest responsible and complying bid.
The opening of bids shall only be made in the presence of the provincial or city auditor or his duly authorized representative who shall initial and secure copies of the bids and certify the abstract of the bidding.