43 U.S.C. § 144: Entries on land withdrawn as valuable for oil or gas validated

Entries existing on February 7, 1925, and allowed prior to April 1, 1924, under the Stock Raising Homestead Act of December 29, 1916 (Thirty-ninth Statutes at Large, page 862) [43 U.S.C. 291 et seq.], for land withdrawn as valuable for oil or gas, but not otherwise reserved or withdrawn, are validated, if otherwise regular: Provided, That at date of entry the land was not within the limits of the geologic structure of a producing oil or gas field.