This Regulation of the Minister of Agriculture and Rural Development, which is composed of five articles and two Annexes, establishes the method of marking sows with earrings with an individual identification numbers of the sows, including their design and technical specification. The earring is placed on the auricle in a way that allows easy reading of the identification number. The design of the earring is specified in Annex 1. Annex 2 contains technical specification of an earing with individual identification number.