The mandatory labelling scheme for eggs was introduced in 2004 following the optional ability to label eggs produced from caged hens as "eggs from caged hens" which had been in operation since 1995.
Munade kohustuslik märgistussüsteem kehtestati 2004. aastal, kuid vabatahtlik puuris peetavate kanade munade märgistamine oli kasutusel juba alates 1995. aastast.