MTR 3.10:
Competitive and Professional REL tournaments impose additional restrictions on sleeves. Highly reflective backs are not allowed; sleeves with artwork on their backs are only acceptable if there is a single color at the sleeves' edges; sleeves with holograms across some or all of the sleeve front or back are not allowed.
When using sleeves on double-faced cards, sleeves must be completely opaque. The Head Judge is the final authority on what sleeves are allowed.

Kortom: plaatjes mogen wel, als ze maar niet doorlopen tot aan de rand.