Okla. Stat. tit. 66, § 66-165: Filing map of route

Any railroad corporation organized under the laws of any other

state or territory whose chartered line or route passes through the

Territory of Oklahoma or Indian Territory or either or both of them,

and whose chartered line or route was not specifically designated or

described in its articles of incorporation or organization, is

hereby authorized to prescribe its line or route through the State

of Oklahoma by filing with the Secretary of State a copy of a

resolution of its board of directors describing the same and a map

duly certified by its president and chief engineer showing such

route: Provided, that such route may be changed on account of

engineering difficulties or for other sufficient reasons by

resolution of its board of directors; and a duly certified copy of

such resolution and a map showing such change in its route shall be

filed with the Secretary of State.