1.Member States conducting sample surveys in order to obtain statistics on permanent crops shall take all necessary steps to ensure that the coefficient of variation of the data shall not exceed, at national level, 3 % for the planted area for each of the crops referred to in Article 1(1).
2.Member States which decide to use sources of statistical information other than surveys shall ensure that the information thereby obtained is of at least equal quality to the information obtained from statistical surveys.
3.Member States which decide to use an administrative source to provide the statistics on permanent crops referred to in points (a) to (l) of Article 1(1) shall inform the Commission in advance and shall provide details concerning the method to be used and the quality of the data obtained from that administrative source.