One-year and five-year subscriptions carry unlimited access and are recommended for users who make regular use of the TLG®.
The 'countdown' type of subscription is offered for the first time (on an experimental basis) to accommodate individuals who need to consult the TLG only occasionally and do not wish to assume the higher cost of unlimited subscription. A countdown subscription does not have a fixed expiration date. Access ends when the user exhausts the prepaid number of hours. The countdown subscription has a minimum of 20 prepaid hours but users may purchase additional 20-hour increments.