Yes. It's a statement for the retail version inserted by the publisher or indie author.
For example, Smashwords is a retailer, distributor (Apple, Kobo, B&N, etc) and also supplies to libraries. The only difference possible on the three versions is the price. Smashwords don't at all change the uploaded book, nor do they have DRM at all on any title.
Here is a different one (the lack of DRM is implied)
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Copyright conditions: All Rights Reserved, purchases may be archived securely or converted for personal use to other ebook formats. Uploading or sharing copies is violation of copyright even if the file was obtained without cost.
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