This seems to be a question of the structure of the document. We note even given a single annex, we can (a) include material, by reference, from the annexes for SVC and MVC and (b) introduce not only a general sample-entry code e.g. xevc, where you look at the sample entry and sample groups etc. to see what’s enabled and present, and also more specific ones that require certain characteristics (e.g. mevc for multi-view without scalability, or sevc for the reverse).
