This Decree validates the mandatory Regulation for calculation of prime cost of flax fiber applicable to legal persons and individual entrepreneurs performing manufacturing and trade of flax fiber on the national territory. The calculation formula shall take into consideration: (a) raw materials, including interests on credits used for purchase of raw materials; (b) return waste (subtracted); (c) transport and procurement cost; (d) fuel and electric energy; (e) expenditure on workforce; (f) cont