Confidentiality agreements may be unlimited and the disclosure of confidential information by the parties may at any time cover or end on a given date or event. The disclosing party must also require the recipient to acknowledge that the confidential information is the property of the disclosing party and that disclosure of the information does not confer on the recipient any right, title or license to the information. This is necessary to avoid any ambiguity as to the rights that the recipient may have over the confidential information. As a general rule, the transfer of rights would not be the subject of a confidentiality agreement, but of a development or joint venture agreement if the parties decided to cooperate using the confidential information. .