Autodesk subscription customers and previous releases

I have previously written about Autodesk support for prior versions and wanted to add this information as well.

Usually updates to terms and conditions might slip through but this one is useful and another incentive to be on subscription.

The TsAndCs_WW.pdf has all the fine prints. There is also a list of eligible products.

Effective April 7, 2008, Subscription customers may now use previous versions up to three releases back from the 2009 product release up to the total number of licenses of the product currently under Subscription.
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As part of the new enhancement to the current policy, a Subscription customer is no longer required to have owned the previous version in order to use it.
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The updated terms and conditions clarify the extended policy and how you may use previous versions. (Section 2.4)
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Access the Eligible Previous Version list in Subscription Center. Once logged in click on the Subscription Administration link on the left hand navigation.
What do you need to know?
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The new terms and conditions (Adobe® PDF format, requires Adobe® Reader®) apply immediately if you have an existing Subscription contract.
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The new terms and conditions apply if you renew your contract, or purchase additional products on  subscription, or add new products or services to an existing contract.
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No action is required for the new terms and conditions to take effect. Please refer to Section 8.9 of your existing Subscription terms and conditions if you want to see the options you have when Autodesk revises the terms and conditions.
The terms and conditions, which are referenced in all order confirmations, are available on Subscription Center, or you can also download the terms and conditions as a Microsoft® Word document. (Download ZIP file)
If you still have questions about the new terms and conditions or would like to notify us that you do not accept them, contact your Authorized Autodesk Reseller or the Autodesk Business Center.
Thank you for choosing Subscription for your Autodesk products.
Sincerely,
The Autodesk Subscription Team