(January 5, 2017, 1:52 PM EST) -- TULSA, Okla. — The trustee of an irrevocable trust on Dec. 28 filed a brief in Oklahoma federal court contending that the trust’s claims pertaining to a mineral lease for hydraulic fracturing are valid under federal law and, therefore, the U.S. government’s motion to dismiss should be denied (Lyman Gilbert Lenker, Trustee of the Virginia Lenker Irrevocable Trust v. Sally Jewell, et al., No. 16-cv-532, N.D. Okla.)....