; or (II) significantly impacted by insect infestation or disease. (ii) Understocked The term understocked means, with respect to forest land that has a forest canopy cover gap— (I) of not less than 50 acres; or (II) that is ecologically detrimental to the forest, as determined by the Regional Forester, taking into account factors such as the need to protect critical water supplies from erosion, specific wildlife habitat restoration, and a history of natural or anthropogenic events. . (2) Conforming amendments (A) Cooperative Forestry Assistance Act of 1978 Section 9 of the Cooperative Forestry Assistance Act of 1978 ( 16 U.S.C. 2105 ) is amended in the matter following paragraph (5) of subsection (g)— (i) by striking section 3(d) and inserting subsection (e) of section 3 ; and (ii) by striking 1601(d) and inserting 1601 . (B) Reforestation trust fund Section 303 of the Act of October 14, 1980 ( Public Law 96–451 ; 16 U.S.C. 1606a ) is amended— (i) in subsection (b)(2), by striking $30,000,000 and inserting $60,000,000 ; and (ii) in subsection (d)(1)— (I) by striking section 3(d) and inserting subsection (e) of section 3 ; and (II) by striking 1601(d) and inserting 1601 . (C) Stewardship end result contracting projects Section 604(c) of the Healthy Forests Restoration Act of 2003 ( 16 U.S.C. 6591c(c) ) is amended by adding at the end the following: (8) With respect to projects under subsection (b) entered into only by the Chief, reforestation in accordance with the priorities specified in subsection (e)(3)(A)(ii) of section 3 of the Forest and Rangeland Renewable Resources Planning Act of 1974 ( 16 U.S.C. 1601 ). . (3) Good neighbor authority Section 8206 of the Agricultural Act of 2014 ( 16 U.S.C. 2113a ) is amended— (A) in subsection (a)(4)(A)— (i) in clause (ii), by striking and at the end; (ii) by redesignating clause (iii) as clause (iv); and (iii) by inserting after clause (ii) the following: (iii) with respect to National Forest System land, reforestation activities; and