Okla. Stat. tit. 61, § 61-111: Time for awarding of contract

The awarding of a contract to the lowest responsible bidder or

bidders shall be made within thirty (30) days after the opening of

bids unless the governing body of the awarding public agency, by

formal recorded action and for good cause shown, provides for a

reasonable extension of that period, which extension period shall

not in any event exceed fifteen (15) days where only state or local

funds are involved, or not to exceed ninety (90) days on any award

of contract for the construction of a public improvement where funds

are utilized which are furnished by an agency of the United States

Government. Upon mutual written agreement between the lowest

responsible bidder or bidders and the awarding public agency, the

Division or awarding public agency may extend the contract award

period no more than one hundred twenty (120) days from the bid

opening date.