Section 4
SEC. 4. In addition to his existing powers under present laws, the Postmaster General or his duly authorized representative, in order to prevent dissemination thru private express and/or messenger delivery service firm of articles which are harmful to national security, public welfare and interest; to insure safe and proper handling of articles sent thru private express and/or messenger delivery service firm and in order to prevent ruinous competition among private express and/or messenger delivery firms, shall have the following powers: Exercise jurisdiction, supervision, and control over any express and/or messenger delivery service firm, its authority to operate, equipment and other properties, and in the exercise of this power it shall have the aid of the public police force; To grant or issue certificates which shall be known as "Authority to Operate Express and/or Messenger Delivery Service" whenever he finds that the operation of the express and/or messenger delivery service will promote the public interest in a proper and suitable manner: Provided, That no such authority shall be issued for a period of more than 15 years; To extend, suspend, or cancel as the case may be, at any time any "Authority to Operate Express and/or Messenger Delivery Service" when public interest so requires or whenever the holder thereof has violated any order, rule or regulation of the Bureau of Posts or as may be prescribed by the Postmaster General; To promulgate such reasonable rules, regulations, and practices as will enable it to effectively exercise its powers or to safeguard public interest; To fix and determine rates and charges of any express and/or messenger delivery service; To exclude from being carried by express and/or messenger delivery service any article which the Postmaster General considers harmful to public welfare, national security, public morals and decency, and to confiscate and dispose such articles in the manner he may prescribe; To compel an express and/or messenger delivery service firm to maintain adequate and specific records of transactions and operations, and to exhibit the same to the Postmaster General, or his duly authorized representative upon demand.