The President will be advised of such a strike or lockout sufficiently in advance of its occurrence because Section 8 (d) of the Act requires 60 days’ written notice of termination or modification of a collective bargaining contract, and notification of the Federal Mediation and Conciliation Service and equivalent state or territorial services within thirty days after such notice of the existence of a dispute.[253] Looking to restrictions upon federal employment, it is convenient to begin with 1940, the year in which, in an effort to expedite the strengthening of the national defense, Congress gave the Secretary of War limited power to remove army civil service employees for security reasons. The Secretary might remove from the classified civil service of the United States any employee of the Military Establishment forthwith if he found that such person had been guilty of conduct inimical to the public interest in the defense program of the United States, and if the person terminated had received notice of the charges.[254] Discharged employees were given the opportunity within thirty days of removal to answer charges in writing and to submit affidavits in support of written answers.[255] Great discretion was permitted the civilian heads of the armed services in promoting or demoting regular officers during wartime, and as early as July 29, 1941 the President signed a Joint Resolution giving the Secretary of War power during the time of the national emergency to remove any officer from the active list of the Regular Army. The only restriction on the exercise of this power was that a comparison of the officer’s performance-of-duty record with those of his fellow officers would be made. But retention in or dismissal from the active list, of any officer, ultimately could be determined by the Secretary,[256] even though affected officers were guaranteed a hearing before a board of not less than five general officers prior to separation.[257] Supplementing this was the provision that no payment could be made from money appropriated in the Act to any officer on the retired list of the Army who, for himself or for others, was engaged in the selling or the sale of any war materials or supplies either to the Army or the War Department.[258]