7 C.F.R. § 1450.204
(a) For the purposes of this subpart, eligible land must be physically and legally capable of producing an eligible crop and must be:
(b) For the purposes of this subpart, eligible land is not:
(3) Land enrolled in the Conservation Reserve Program (CRP) as specified in part 1410 of this chapter for which either:
(4) Land enrolled in the Agricultural Conservation Easement Program (ACEP) for which either:
[75 FR 66234, Oct. 27, 2010, as amended at 80 FR 10575, Feb. 27, 2015]