Okla. Stat. tit. 69, § 69-1206.1: State highways - Rights-of-way - County

nonparticipation.

No county, regardless of population, and no municipality having

a population of less than sixty thousand (60,000) persons according

to the latest Federal Decennial Census shall be required to

participate financially in the acquisition of lands for use for

rights-of-way for state highways contracted for and constructed

after the effective date of this section; provided, that this act

shall not relieve any county or any said municipality, except those

with a population of one thousand five hundred (1,500) or less, of

such financial participation where responsibility for the same has

been assumed under a preexisting contractual agreement with the

department.