_________, and shall be approved by the relevant authorities within one week to become effective. 11.2 this contract shall be written in english in four copies. each party shall keep two copies. 11.3 the duration of the contract is stipulated in art. 11. 11.4 appendix to the contract shall form an integral part of the contract and shall have the same binding force as the contract itseff. 11.5 all documents, letters, telegrams and telexes interexchanged between both parties before the signing of the contract shall become null and void automatically from the date on which the contract comes into force. 11.6 this contract can only be altered, amended and supplemented in accordance with the documents which have been signed or stamped by the authorised representatives of both parties. 11.7 letters, telegrams and telexes shall be used for communication between both parties during the contracted period. letters shall be in duplicates. article 12 legal addresses parta(address):_________ partb(address):_________
party a(signature):_________ party b(signature):_________