; and (B) does not include trees, or portions of trees, except as provided in regulations issued under this section by the Secretary. (2) National Forest System The term National Forest System has the meaning given that term in section 11(a) of the Forest and Rangeland Renewable Resources Planning Act of 1974 ( 16 U.S.C. 1609(a) ). (3) Secretary The term Secretary means the Secretary of Agriculture.