Okla. Stat. tit. 66, § 66-161: Extension of road into state

Any railroad corporation chartered by or organized under the

laws of the United States or any state or territory, whose

constructed railroad shall reach or intersect the boundary line of

this state at any point, may extend its railroad into this state

from any such point or points to any place or places within the

state, and may build branches from any point on such extension.

Before making such extension or building any such branch road, such

corporation shall, by resolution of its directors, to be entered in

the record of its proceedings, designate the route of such proposed

extension or branch in the manner provided in Section 1376, and file

a copy of such record, certified by the president and secretary, in

the office of the Corporation Commission, and cause the same to be

recorded as provided in said Section 1376. Thereupon such

corporation shall have all the rights and privileges to make such

extension or build such branch and receive such aid thereto as it

would have had had it been authorized so to do by articles of

association duly filed in accordance with the provisions of this

article.