36 CFR 223.162: Limitations on timber harvested from all other states.

Unprocessed timber from National Forest System lands west of the 100th Meridian in the contiguous 48 States may not:

(a) Be exported from the United States;

(b) Be used in substitution for unprocessed timber from private lands which is exported by the purchaser; or

(c) Be sold, traded, exchanged, or otherwise given to any person who does not agree to manufacture it to meet the processing requirements of this section and/or require such a processing agreement in any subsequent resale or other transaction. This limitation on export or substitution does not apply to species of timber previously found to be surplus to domestic needs or to any additional species, grades, or quantities of timber which may be found by the Secretary to be surplus to domestic needs.