Great!
However, I don't think you need to worry about 'revisiting' the work if they change the standard in the future. The images are released under a specific version of the license... I think the latest for CC SA is version 4. As long as you comply with the requirements of the version under which it was released the author cannot take back - or change - those licenses.
As a matter of fact, it says so, right on the
license:
Quote:
The licensor cannot revoke these freedoms as long as you follow the license terms.
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