Someone asked me something interesting regarding what official releases need to be owned before getting the Despecialized Editions.

Apparently, some countries like Hong Kong and the Philippines had DVD-only versions of the 2011 Special Editions which were the basis for the Despecialized Editions.

She asked me if one is legally allowed to download the Despecialized Editions if she owns the 2011 Special Editions on DVD but not Blu-ray.
And if so, is she allowed to download any version or just the DVD5 version?

And, if she bought the digital releases but only in SD, is she allowed to download any version of the Despecialized Edition or only the DVD5 version?

Please give me answers for my friend who wants to dip into the Despecialized Editions.