建筑安装工程承包合同(36)

article 19-　assignment and sub-contractors
　　　　1.　the contractor shall have the right to sub-contract this contract or any part thereof in accordance with his usual practice without relieving the contractor of the obligations of performing this contract.
　　　　2.　neither party shall without the previous consent in writing of the other party assign or any part thereof to any third party， except in the case of a company amalgamation or reconstruction， provided that such consent shall not be unreasonably withheld.
article 20-　publicity
　　the contractor shall obtain the owner's approval prior to making any publicity releases or public announcements relating to this contract.
article 21-　effective date of the contract
　　　　1.　the effective date of this contract shall be the date after its execution when all the necessary approvals of the respective authorities have been obtained by the owner.
　　　　2.　if the contract does not become effective within（_________） days from the date of execution， it will be deemed void unless otherwise agreed between the parties.
article 22-　law and regulations
　　　　1.　the contractor shall in all matters relating to the performance of this contract conform with all applicable laws， regulations and orders of central or local authorities.
　　　　2.　the construction， validity and performance of this contract shall be governed in all respects in accordance with the laws of _________
article 23-　entire contract
　　　　1.　this contract constitutes the entire agreement between the parties hereto and supersedes all prior negotiations， representations or agreements whether oral or in writing relative to the subject matter of this contract.
　　　　2.　this contract shall be altered or supplemented only by mutual consent in writing between the owner and the contractor.
article 24-　language of the contract
　　this contract was drafted in english language and the english text of this contract shall be valid and binding upon the parties hereto.