Time frame: This should include the date the NDA goes into effect, as well as how long it will remain in effect. First, the agreement can contain a specific time period, such as three years from the date signed. You can also choose an event upon which the non-disclosure agreement will expire, such as when the project is completed or when consideration of the confidential information is complete. Generally, there are no limits to how long you can stretch the conditions of the NDA, but they should be reasonably connected to the information being shared and the reason for sharing that information.