...
As for actual design of the ecolabels, we propose a three tier system, consisting of red, yellow, and green labels. The red label will indicate a product from an unhealthy, unsustainable population which if possible should not be eaten. The yellow and green labels will indicate fish that are being fished in a sustainable manner with the difference being that they yellow labeled fish come from populations that have not yet completely recovered while the green labeled fish come from populations that have reached half of caring capacity and are being fished at or slightly below maximum sustainable yield. We would encourage choosing green labeled fish over those with yellow labels, and strongly discourage any consumption of red labeled fish.
-- (2004). "Alaska Pollock Marketing Group Says MSC Certification will Strengthen Marketing Efforts." Retrieved November 21, 2007, from http://www.alaskapollock.org/images/MSCCertification.pdf
.
-- (2007). "About MSC." Retrieved on November 18, 2007, from http://www.msc.org/html/content_462.htm.
...