98 Previous concert - agreement to commit a crime or carry out criminal activities, that has been made by accomplices prior to the commitment of the crime. Representative of authorities - a person, who represents an organ of public authority, is permanently or temporarily in charge to perform certain functions, and, within the scope of his competence, is entitled to the right of taking actions or giving orders that are mandatory for a majority or all individuals or officials. Precursors - any substance, natural or synthetic, that is included in Lists 1 and 2 of the Annex to the 1988 UN Convention on Combating Illegal Traffic of Narcotic or Psychotropic Substances. Psychotropic substance - any substance, natural or synthetic, that is included in Lists 1, 2, 3, and 4 of the 1971 UN Convention on Psychotropic Substances. Official secret - information in the field of science, technology, production and management, disclosure of which may cause damage to the interests of the Republic of Uzbekistan. Medium crop area - crop area from 250 to 1,000 sq. meters. Economic entity - enterprises, regardless their form of ownership, or individuals, who are carrying out entrepreneurial activities.