This Treaty shall come into force upon the deposit of ratifications by all the High Contracting Parties This Treaty shall remain in force for a period of forty" years from its effective date. The High Contracting Parties, aĞreP to consult each other six months hefore the date of exoi ration of this Treaty for the purpose of determining whether the interests of international peace and security require its renewal, with or without modification, or wheth- er the German people have so far progressed in the recon struction of their life on a democratic and peaceful basis that the continued imposition of control measures is no longer necessary.