(4)In the field of agriculture, as regards Council Directive 1999/74/ECnote, it is noted that, in Mayotte, laying hens are reared in unenriched cages. In view of the considerable investment and preparatory work required to replace unenriched cages by enriched cages or alternative systems, it is necessary to postpone the prohibition of using unenriched cages for a period of up to 48 months from 1 January 2014. In order to prevent distortions of competition, eggs derived from establishments using unenriched cages should be marketed only on the local market of Mayotte. In order to facilitate the necessary controls, eggs produced in unenriched cages should bear a special mark.