Commission Regulation (EU) 2016/2139 of 2 December 2016 establishing a prohibition of fishing for skates and rays including Cuckoo ray, thornback ray, blonde ray, spotted ray, small-eyed ray and undulate ray in Union waters of VIId and relevant special conditions in Union waters of VIa, VIb, VIIa-c and VIIe-k by vessels flying the flag of Belgium