This link gives the European Union guidelines. http://www.yellow-egg.com/wEnglish/frische_eier/index.shtml?navid=5 I don't think "fresh" is really well defined. It can mean different things to different people. If you boil an egg before it has been stored for about two weeks it can be very hard to peel unless you take specific steps. The egg looses freshness because it loses moisture through the shell over time. The egg inside the shell changes texture and consistency due to this moisture loss. For some purposes, a not real fresh may be better than a just laid egg.
You might want to consider the state egg board that say an egg has a sale life of one month from the day it's packaged.
Yesterday I went to the coop in one nest box I found an egg that was really cold..one step away from frozen..then under Lil Bit ( my broody hen) was an egg laid by one of the other hens and it was warm and Fresh! Theres my definition!
