Like provisions are contained in the Invention Secrecy Act of 1951. When the head of a government agency holding a property interest in an invention deems publication or disclosure by the grant of a patent detrimental to the national security, the Secretary of Commerce, as soon as notified, is required to order that the invention be kept secret and withhold the patent therefore.[476] When the Secretary of Commerce believes that publication or disclosure of an invention by the granting of a patent, in which the government does not have a property interest, might be detrimental to the national security, he must make the application for patent in which such invention is disclosed available for inspection to the Atomic Energy Commission, the Secretary of Defense, and the chief officer of any other department or agency of the government designated by the President as a defense agency of the United States. He must also issue a secrecy order at the request of any of the defense agencies. Moreover, if there is a proper showing by the head of the department or agency who caused the secrecy order to be issued that the examination of the application might jeopardize the national interest, the Secretary of Commerce must maintain the application in a sealed condition and notify the applicant accordingly. _Secrecy of Testimony_: Two statutes examined contained provisions requiring or approving the suppression of information at the request of persons who had provided it to emergency agencies. In Section 202 thereof the Emergency Price Control Act of 1942 authorized the Price Administrator to make investigations, subpoena witnesses, and compel testimony upon the grant of immunity from prosecution. The same Act also provided that the Administrator should not publish or disclose any information obtained under the Act that the Administrator deemed confidential or with reference to which a request for confidential treatment had been made by the person furnishing such information, unless he determined that the withholding thereof was contrary to the interest of the national defense and security.[477] This, of course, is the reverse of the usual requirement that information be made public unless contrary to the interest of the national defense and security. The Export Control Act of 1949 also contained a compulsory testimony provision, with the requirement that, except as necessary to the national interest, information given in such testimony be kept confidential upon request of the witness.[478] REGULATION OF PROPAGANDA ACTIVITIES