For (nearly) all Release types defined in the Release Profile standard one cover art image needs to be communicated. This also applies to box sets. However, in most cases a box set is accompanied by one image for each of the "constituent albums" plus one for the set (which image is associated with which is indicated in the
Issue 1: DSP can only handle one image
In many circumstances, DSPs may not be able to handle multiple images for a single Release. In that case, a DSP is suggested to use the image not linked to any of the constituent albums to represent the box set and all its content.
Issue 2: Label does not provide an image for the components
If a label only provides an image for the box set, then the DSP will be at liberty to use that images to represent any of the constituent parts.