If it weren't for the fact that it used to say what it did, I think what you suggest would be great. However, given that we explicitly disallowed color 16 for the background of the printed pattern before (except for transparent stickers), it might be better to explicitly require it now (in the second paragraph). Like so:
Quote:The sticker pattern is modelled by real colours; they are not modifiable from the outside. All printed colours of the pattern must be matched, and the background (non-printed portion) of the pattern must use colour 16. Mimicking a colour by blending in the background colour of the part underneath using colour 16 is not allowed. Since edges are forbidden in sticker parts, colour 24 is not allowed.