7 C.F.R. § 1410.63
(b) Commercial shooting preserves may be operated on CRP acreage provided:
(f) There are specific activities that are permitted on specific land:
(1) The permitted activities provisions of paragraphs (f)(2) and (3) of this section do not apply to land enrolled under:
(iii) The Conservation Reserve Enhancement Program described in § 1410.90:
(2) The following activities may be permitted on CRP acreage according to an approved conservation plan, without any reduction to the annual rental payment:
(i) Emergency haying, emergency grazing, or emergency use of the forage in response to a localized or regional drought, flooding, wildfire, or other emergency as determined by CCC on all practices, outside the primary nesting season, when:
(v) The intermittent and seasonal grazing of vegetative buffers, only outside the primary nesting season, that are incidental to agricultural production on land adjacent to the buffer provided such grazing:
(3) The following activities may be permitted on CRP acreage according to an approved conservation plan, but only in exchange for a 25 percent reduction to the annual rental payment for the acres on which the permitted activity occurred:
(ii) Haying and other commercial use (including the managed harvesting of biomass, but not the harvesting of vegetative cover) of all practices, on the condition the activity: