(1) Prohibition on export. Except as specifically provided under this chapter, no person may:

(a) Export from the United States export restricted timber; or

(b) Sell, trade, exchange, or otherwise convey to any other person, for the purpose of export from the United States, export restricted timber.

(2) Prohibition on substitution. Except as specifically provided under this chapter, no person may purchase or possess an active contract for export restricted timber from any agency if such person owns and operates a processing facility and the processing of export restricted timber at such facility by such person would constitute substitution.

(3) Prohibition on certain indirect transactions. Except as specifically provided under this chapter, no person may purchase from any other person export restricted timber if such person is prohibited under WAC 240-15-015(2) (relating to substitution) from purchasing such timber directly from the agency managing the public lands from which such timber originated.

(4) Exemptions. Notwithstanding any other provisions of this chapter;

(a) The prohibition in WAC 240-15-015(2) (relating to substitution) shall not apply to the use of timber originating from public lands which is either (i) hardwood timber, or (ii) Western Red Cedar.

(b) The prohibitions in WAC 240-15-015(3) (relating to certain indirect purchases) shall not prohibit the sale of up to 33 1/3 percent of the volume (not including hardwoods and western red cedar) in any sale purchased in calendar year 1991 to a person or persons who are otherwise ineligible under WAC 240-15-015(3) to purchase such timber, provided the timber is processed at a domestic facility. For timber sales sold in calendar year 1992, the volume that may be sold to such persons shall be reduced to 20 percent of the total volume (not including hardwoods and western red cedar). For timber sales sold in calendar year 1993 and after, the volume that may be sold to such persons shall be reduced to 10 percent of the total volume (not including hardwoods and western red cedar). The transferor shall notify the department of revenue, in writing, of any such transaction prior to physically transferring the timber to the transferee. Rights to purchase export restricted timber under this paragraph may be used on a sale by sale basis and may not be accumulated or transferred to other sales. The advertised volume or volume specified in the sale agreement shall serve as the basis for determining the sale volume to which the percentage applies.

(c) The prohibition in WAC 240-15-015(2) (relating to substitution) shall not prohibit the purchase by any person of export restricted timber originating from public lands in Ferry County or any other county in the State of Washington partially or entirely east of the Columbia River if such person does not export or sell for export timber from private lands in that geographic area.

(d) The prohibition in WAC 240-15-015(2) (relating to substitution) shall not apply to any log, regardless of gross scale, sold to a domestic processing facility for the purpose of conversion into chips, pulp or pulp products.