Okla. Stat. tit. 56 § 35
It shall be the duty of the overseers of the indigent in counties where no common indigent care facility is established, two (2) weeks next preceding the first Monday of April, in each year, to give public notice by having published in the newspaper or newspapers in their respective counties, or in case no such newspaper is published in the county, by posting upon three public places in the county, an advertisement certifying the indigent that are to be provided for and asking for sealed proposals for their maintenance during the coming year. The sealed proposals shall be opened and acted upon by the overseers of the indigent at their regular meeting, beginning on the said first Monday in April; but nothing herein contained shall prohibit any overseers of the indigent from receiving and accepting propositions at any time for the keeping of such indigent persons as may in the interim become a county charge, or of rejecting the propositions of such persons as they know to be unable to fulfill their obligations to the indigent.
Okla. Stat. tit. 56, § 35