29 U.S. Code
§1241. Definitions
(a) The term interstate commerce means commerce between any State, Territory, possession of the United States, or the District of Columbia, and any place outside thereof.
(b) The term switchblade knife means any knife having a blade which opens automatically
(1) by hand pressure applied to a button or other device in the handle of the knife, or
(2) by operation of inertia, gravity, or both.
§1242. Introduction, manufacture for introduction, transportation or distribution in interstate commerce; penalty
Whoever knowingly introduces, or manufactures for introduction, into interstate commerce, or transports or distributes in interstate commerce, any switchblade knife, shall be fined not more than $2,000 or imprisoned not more than five years, or both.
(Pub. L. 85623, §2, Aug. 12, 1958, 72 Stat. 562.)
§1244. Exceptions
Sections 1242 and 1243 of this title shall not apply to
(1) any common carrier or contract carrier, with respect to any switchblade knife shipped, transported, or delivered for shipment in interstate commerce in the ordinary course of business;
(2) the manufacture, sale, transportation, distribution, possession, or introduction into interstate commerce, of switchblade knives pursuant to contract with the Armed Forces;
(3) the Armed Forces or any member or employee thereof acting in the performance of his duty;
(4) the possession, and transportation upon his person, of any switchblade knife with a blade three inches or less in length by any individual who has only one arm; or
(5) a knife that contains a spring, detent, or other mechanism designed to create a bias toward closure of the blade and that requires exertion applied to the blade by hand, wrist, or arm to overcome the bias toward closure to assist in opening the knife.
TITLE 18 - CRIMES AND CRIMINAL PROCEDURE
PART I - CRIMES
CHAPTER 83 - POSTAL SERVICE
Section 1716. Injurious articles as nonmailable
(g) All knives having a blade which opens automatically (1) by
hand pressure applied to a button or other device in the handle of
the knife, or (2) by operation of inertia, gravity, or both, are
nonmailable and shall not be deposited in or carried by the mails
or delivered by any officer or employee of the Postal Service. Such
knives may be conveyed in the mails, under such regulations as the
Postal Service shall prescribe -
(1) to civilian or Armed Forces supply or procurement officers
and employees of the Federal Government ordering, procuring, or
purchasing such knives in connection with the activities of the
Federal Government;
(2) to supply or procurement officers of the National Guard,
the Air National Guard, or militia of a State ordering,
procuring, or purchasing such knives in connection with the
activities of such organizations;
(3) to supply or procurement officers or employees of any
State, or any political subdivision of a State or Territory,
ordering, procuring, or purchasing such knives in connection with
the activities of such government; and
(4) to manufacturers of such knives or bona fide dealers
therein in connection with any shipment made pursuant to an order
from any person designated in paragraphs (1), (2), and (3).
The Postal Service may require, as a condition of conveying any
such knife in the mails, that any person proposing to mail such
knife explain in writing to the satisfaction of the Postal Service
that the mailing of such knife will not be in violation of this
section.