All specifications for the undertaking of any public construction contract shall contain
a provision that bid prices shall remain in effect during the period between the bid
opening and the award of a contract; the department shall within the time limit set
forth in state statutes, more particularly R.S. 38:2215, recommend to the council
that the contract be awarded to the lowest responsible bidder or that all bids be
rejected. The parish and the lowest responsible bidder, by mutual written consent,
may mutually agree to extend the deadlines for award by one (1) or more extensions
of thirty (30) calendar days.