(a) After an easement has been recorded, no substantive modification will be made to the easement. Modifications that would not result in acquisition or divestiture of additional property rights may be made.

(b) State Conservationists may approve modifications for restoration agreements and GRP management plans or conservation plans where applicable, as long as the modifications do not affect the provisions of the easement and meet program objectives.

(c) USDA may approve modifications to rental contracts, including corresponding changes to conservation plans, GRP management plans, and restoration plans to facilitate the practical administration and management of the enrolled area so long as the modification will not adversely affect the grassland functions and values for which the land was enrolled.