This Decree distinguishes between marketable timber species (listed as category A in the Schedule), potentially marketable timber species (all species other than categories A and C, and timber species the logging of which is prohibited (listed as category C in the Schedule) (art. 2). Article 3 gives a definition of “marketable species” and describes size and other characteristics of such timber. No logging shall take place of marketable timber or potentially marketable timber trees of less than