I'm not sure I follow the logic. A setup where you are not allowed to store a document on a disk of some kind is not going to be friendly to a solution where yo

I'm not sure I follow the logic. A setup where you are not allowed to store a document on a disk of some kind is not going to be friendly to a solution where you instead can store the document on a little microSD card hooked up to a eInk display instead. If there's a fetish for a "this document is an actual physical object" somewhere (with all the usual security theater about security from theft and alteration), it's not going to be helped by taping eInk to a disk.