Okla. Stat. tit. 66, § 66-164: Domestication of foreign corporations in the Territory

Every railroad corporation organized under the laws of any other

state or territory or of the United States that has complied with

the laws of the Territory of Oklahoma or of the Indian Territory,

within three (3) years before the taking effect of the Constitution

of this state, to authorize such corporation to transact business in

either or both of such territories and organized for the purpose of

constructing its line of railroad through the Territory of Oklahoma,

or Indian Territory, or either or both of them, is hereby authorized

and empowered to construct, maintain and operate its railroad with

all proper branches or extensions thereof through the State of

Oklahoma or any part thereof formerly constituting the Territory of

Oklahoma or Indian Territory, or either or both of them, and may, by

complying with the provisions of Section 1454 and the Constitution

of this state become domestic corporation under the Constitution and

laws of this state.