“ To protect the national security of the United States by permitting the summary suspension of employment of civilian officers and employees of various departments and agencies of the Government, and for other purposes. ”

“ Provided, That to the extent that such agency head determines that the interests of the national security permit, the employee concerned shall be notified of the reasons for his suspension and within thirty days after such notification any such person shall have an opportunity to submit any statements or affidavits to the official designated by the head of the agency concerned to show why he should be reinstated or restored to duty. ”

“ Provided further, That the head of any department or agency considering the appointment of any person whose employment has been terminated under the provisions of this Act may make such appointment only after consultation with the Civil Service Commission, which agency shall have the authority at the written request of either the head of such agency or such employee to determine whether any such person is eligible for employment by any other agency or department of the Government. ”