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90 APPENDIXES Commission and its joint groups and to the International Commission and its inspection teams in the performance of the functions and tasks assigned to them by the present Agrecment. Article 26 The costs involved in the operations of the Joint Commission and joint groups and of the International Commission and its laspection Teams shall be shared equally between the two parties, Article 27 The signatories of the present Agreement and their successors in their functions shall be responsible for ensuring the observance and enforcement of the terms and provisions thereof. The Commanders of the Forces of the two parties shall, within their respective com- mands, take all steps and make all arrangements necessary to ensure full compliance with all the provisions of the present Agreement by all elements and military personnel under their command. The procedures laid down in the present Agreement shall, whenever necessary, be studied by the Commanders of the two parties and, if necessary, defined more specifically by the Joint Commission. Chapter VI—Joint Commission and International Commission for Supervision and Control in Vict-Nam 28. Responsibility for the execution of the agreement on the cessa- tion of hostilities shall rest with the parties. 29. An International Commission shali ensure the control and su- pervision of this execution. 30. In order to facilitate, under the conditions shown below, the execution of provisions concerning joint actions by the two partics, a Joint Commission shall be set up in Wict-Nam. 31. The Joint Commission shall be composed of an equal number of represeniatives of the Commanders of the two parties, 32. ‘The Presidents of the delegations to the Joint Commission shall hold the rank of General. The Joint Commission shall set up joint groups the number of which shall be determined by mutual agreement between the parties. The joint groups shall be composed of an equal number of officers from