Okla. Stat. tit. 4, § 4-146: Joinder to partition fence - Payment for or rebuilding of

half of fence.

When land which has lain unenclosed is enclosed the owner

thereof, before he join to any partition fence, already erected,

shall pay for one-half (1/2) of each partition fence between his

lands and the adjoining lands, the value to be ascertained by the

fence viewers, and if he neglects for thirty (30) days after notice

and demand to pay the same, the party to whose fence he joins may

recover as before provided, or such person, enclosing such land,

may, at his election, rebuild and make one-half (1/2) of the fence,

and if he neglects so to do for two (2) months after making such

election, he shall be liable as above provided.