Electronically updating terminal charts follow the same rules as updating terminal charts with a paper subscription. When a CD is received in the mail or an update is downloaded from the Internet, the charts with that update are effective immediately upon receipt. There are a few exceptions where Jeppesen issues a chart mid-cycle, and an effective date is needed on the chart. In this case, you should continue to use the previous chart until the effective date.
On the terminal chart heading, you will see the revision date and the effective date. If there is no effective date, you may use the chart upon receipt.
Review Charts with Revisions.