premise: 3.4. Unless the parties otherwise agree in writing, any documents or records relating to the Confidential Information of the other party which come into the possession of either of them during the existence of this agreement or at any time thereafter: 3.4.1. shall be deemed to form part of the Confidential Information and shall be subject to the terms of this Agreement; 3.4.2. shall not be copied, reproduced, published or circulated by the party receiving the Confidential Information; and 3.4.3. shall be surrendered to the party who divulged the Confidential Information on demand and the receiving party shall not retain any copies or extracts thereof.