Article 2
For the purposes of this Decision: (a) holdings: means an agricultural establishment or officially supervised dealer's premises, situated in the territory of Portugal, in which animals for breeding, sale or slaughter are regularly kept or bred; (b) infected zone: means an area of at least two kilometres in diameter around a holding in which, according to official findings, a clinical or serological case has been diagnosed; (c) infected region: means a wide area, designated by the central authorities, in which it is thought a number of cases of the disease may be present. The central authorities shall designate such an area in their reinforced plan and annually thereafter, and shall notify the Commission before beginning testing each year; (d) serological test: means the complement fixation test (Campbell and Turner's modified method), or any other test that is agreed following the procedure laid down in Article 10.