Commission Implementing Regulation (EU) 2021/1713 of 24 September 2021 extending a derogation from Council Regulation (EC) No 1967/2006 as regards the minimum distance from the coast and the minimum sea depth for boat seines fishing for sand eel ( Gymnammodytes cicerelus and G. semisquamatus ) and gobies ( Aphia minuta and Crystalogobius linearis ) in certain territorial waters of Spain (Catalonia)