At the Sustainable Development Summit in Johannesburg in 2002, the European Union Member States pledged to exploit all their stocks at maximum sustainable yield by 2015.
Le linn an chruinnithe mhullaigh faoin bhforbairt inbhuanaithe i Johannesburg i 2002, ghabh Ballstáit an Aontais Eorpaigh orthu féin a gcuid stoc ar fad a shaothrú ag leibhéal a n-uasghabhála inbhuanaithe ó 2015 ar aghaidh.