Upon the request of any district , the ownership and pricing limitations imposed by this subchapter shall apply to the irrigable lands classified within such district by the Secretary as having class I productive potential or the equivalent thereof in larger acreage of less productive potential, as determined by the Secretary , taking into account all factors which significantly affect productivity, including but not limited to topography, soil characteristics, length of growing season, elevation, adequacy of water supply, and crop adaptability. ( Pub. L. 97–293, title II, § 207 , Oct. 12, 1982 , 96 Stat. 1266 .) CFR Title Parts 43 426