Prohibited Knife Act

Prohibited Knife Act - Declares that switchblade knives have no redeeming social value and are restricted almost solely to violence.

Provides that whoever knowingly introduces such a knife into interstate commerce shall be fined not more that $2,000 and/or imprisoned not more than five years.

Asserts that all knives which open automatically and which have a blade of more than three inches in length are nonmailable unless the knives are to be used by the members of the Armed Forces in the performance of their duties. Allows the Postal Service to require any person proposing to mail such knife to explain in writing that the mailing of such knife shall not violate the provision of this Act. (Adds 18 U.S.C. 2331-2353).