Okla. Stat. tit. 66, § 66-146: Notice to railroads

Whenever the owner or occupant of any tract of land desires to

construct a fence as provided in the preceding section, he shall

give written notice of his intention to the railroad company upon

whose line such tract is situated, by personal service upon the

agent of said company at the station within this state, nearest to

such tract of land, giving in said notice a description of said

land, and it shall be the duty of the railroad company to construct

and complete its portion of such fence within sixty (60) days after

the service of such notice: Provided, that if such owner or

occupant fails to construct his portion of such fence, then the

railroad company shall not be required to construct such fence.