This rule implements the mandatory changes required by the Agriculture Improvement Act of 2018 (2018 Farm Bill) and other changes made by the Farm Service Agency (FSA) on behalf of CCC. Specifically, the mandatory changes update program applicability and payment limitations; and specify that the Secretary may approve a waiver of the average adjusted gross income (AGI) limitation for participants of certain conservation contracts administered by FSA and the Natural Resources Conservation Service (NRCS) on environmentally sensitive land. Also, the mandatory changes expand the definition of "family member" to include first cousins, nieces, and nephews. This rule also includes changes that make minor clarifications and updates throughout part 1400.