Editorial Notes Codification Section, act Aug. 27, 1954, ch. 1009, § 20, 68 Stat. 877 , which provided that nothing in this subchapter would abrogate any valid lease, permit, license, right-of-way, lien, or other contract approved before Aug. 27, 1954 , was omitted from the Code as being of special and not general application. CFR Title Parts 25 217