<P> (iii) The withdrawals shall commence upon entry into force of this agreement and shall be completed within a period of 30 days thereof . </P> <P> This agreement will be subject to ratification by both countries in accordance with their respective constitutional procedures, and will come into force with effect from the date on which the instruments of ratification are exchanged . </P> <P> Both governments agree that their respective heads will meet again at a mutually convenient time in the future and that in the meanwhile the representatives of the two sides will meet to discuss further the modalities and arrangements for the establishment of durable peace and normalization of relations, including the questions of repatriation of prisoners of war and civilian internees, a final settlement of Jammu and Kashmir and the resumption of diplomatic relations . </P> <P> Zulfiqar Ali Bhutto President Islamic Republic of Pakistan </P>

Indo pak shimla agreement 1972 concluded in which building