18 U.S. Code § 927 - Effect on State law
No provision of this chapter shall be construed as indicating an intent on the part of the Congress to occupy the field in which such provision operates to the exclusion of the law of any State on the same subject matter, unless there is a direct and positive conflict between such provision and the law of the State so that the two cannot be reconciled or consistently stand together.
Source(Added Pub. L. 90–351, title IV, § 902,June 19, 1968, 82 Stat. 234; amended Pub. L. 90–618, title I, § 102,Oct. 22, 1968, 82 Stat. 1226.)
1968—Pub. L. 90–618struck out “or possession” after “State” wherever appearing.
Effective Date of 1968 Amendment