(a) Priority communications
During the continuance of a war in which the United States is engaged, the President is authorized, if he finds it necessary for the national defense and security, to direct that such communications as in his judgment may be essential to the national defense and security shall have preference or priority with any carrier subject to this chapter. He may give these directions at and for such times as he may determine, and may modify, change, suspend, or annul them and for any such purpose he is authorized to issue orders directly, or through such person or persons as he designates for the purpose, or through the Commission. Any carrier complying with any such order or direction for preference or priority herein authorized shall be exempt from any and all provisions in existing law imposing civil or criminal penalties, obligations, or liabilities upon carriers by reason of giving preference or priority in compliance with such order or direction.

(b) Obstruction of interstate or foreign communications
It shall be unlawful for any person during any war in which the United States is engaged to knowingly or willfully, by physical force or intimidation by threats of physical force, obstruct or retard or aid in obstructing or retarding interstate or foreign communication by radio or wire. The President is authorized, whenever in his judgment the public interest requires, to employ the armed forces of the United States to prevent any such obstruction or retardation of communication: Provided, That nothing in this section shall be construed to repeal, modify, or affect either section 17 of title 15 or section 52 of title 29.

(c) Suspension or amendment of rules and regulations applicable to certain emission stations or devices
Upon proclamation by the President that there exists war or a threat of war, or a state of public peril or disaster or other national emergency, or in order to preserve the neutrality of the United States, the President, if he deems it necessary in the interest of national security or defense, may suspend or amend, for such time as he may see fit, the rules and regulations applicable to any or all stations or devices capable of emitting electromagnetic radiations within the jurisdiction of the United States as prescribed by the Commission, and may cause the closing of any station for radio communication, or any device capable of emitting electromagnetic radiations between 10 kilocycles and 100,000 megacycles, which is suitable for use as a navigational aid beyond five miles, and the removal therefrom of its apparatus and equipment, or he may authorize the use or control of any such station or device and/or its apparatus and equipment, by any department of the Government under such regulations as he may prescribe upon just compensation to the owners. The authority granted to the President, under this subsection, to cause the closing of any station or device and the removal therefrom of its apparatus and equipment, or to authorize the use or control of any station or device and/or its apparatus and equipment, may be exercised in the Canal Zone.

(d) Suspension or amendment of rules and regulations applicable to wire communications; closing of facilities; Government use of facilities
Upon proclamation by the President that there exists a state or threat of war involving the United States, the President, if he deems it necessary in the interest of the national security and defense, may, during a period ending not later than six months after the termination of such state or threat of war and not later than such earlier date as the Congress by concurrent resolution may designate, (1) suspend or amend the rules and regulations applicable to any or all facilities or stations for wire communication within the jurisdiction of the United States as prescribed by the Commission, (2) cause the closing of any facility or station for wire communication and the removal therefrom of its apparatus and equipment, or (3) authorize the use or control of any such facility or station and its apparatus and equipment by any department of the Government under such regulations as he may prescribe, upon just compensation to the owners.

(e) Compensation
The President shall ascertain the just compensation for such use or control and certify the amount ascertained to Congress for appropriation and payment to the person entitled thereto. If the amount so certified is unsatisfactory to the person entitled thereto, such person shall be paid only 75 per centum of the amount and shall be entitled to sue the United States to recover such further sum as added to such payment of 75 per centum will make such amount as will be just compensation for the use and control. Such suit shall be brought in the manner provided by section 1346 or section 1491 of title 28.

(f) Affect on State laws and powers
Nothing in subsection (c) or (d) shall be construed to amend, repeal, impair, or affect existing laws or powers of the States in relation to taxation or the lawful police regulations of the several States, except wherein such laws, powers, or regulations may affect the transmission of Government communications, or the issue of stocks and bonds by any communication system or systems.

(g) Limitations upon Presidential power
Nothing in subsection (c) or (d) shall be construed to authorize the President to make any amendment to the rules and regulations of the Commission which the Commission would not be authorized by law to make; and nothing in subsection (d) shall be construed to authorize the President to take any action the force and effect of which shall continue beyond the date after which taking of such action would not have been authorized.

(h) Penalties
Any person who willfully does or causes or suffers to be done any act prohibited pursuant to the exercise of the President's authority under this section, or who willfully fails to do any act which he is required to do pursuant to the exercise of the President's authority under this section, or who willfully causes or suffers such failure, shall, upon conviction thereof, be punished for such offense by a fine of not more than $1,000 or by imprisonment for not more than one year, or both, and, if a firm, partnership, association, or corporation, by fine of not more than $5,000, except that any person who commits such an offense with intent to injure the United States, or with intent to secure an advantage to any foreign nation, shall, upon conviction thereof, be punished by a fine of not more than $20,000 or by imprisonment for not more than 20 years, or both.