; (B) in paragraph (7)(C), by striking the period at the end and inserting ; or ; and (C) by adding at the end the following: (8) cropland, marginal pastureland, grasslands, and other rural land that will— (A) have a positive impact on water quality in furtherance of the goals of the Conservation Reserve Enhancement Program established by the Secretary under section 1231A; and (B) be devoted to a riparian buffer. . (2) Conservation reserve enhancement program Section 1231A of the Food Security Act of 1985 ( 16 U.S.C. 3831a ) is amended— (A) in subsection (b)(3), by adding at the end the following: (C) Updates to existing agreements (i) In general The Secretary shall provide an option to signatories to an agreement under this subsection to update the agreement, without renegotiating other provisions of the agreement, to include new incentives made available under this subchapter beginning on January 1, 2018, such as riparian forest buffer management payments. (ii) Matching funds Requirements for matching funds described in paragraph (2)(B) shall not apply to the updates to an agreement described clause (i). (D) Amendments to an agreement (i) In general In the case of an amendment to an agreement under this subsection, including an addendum to an agreement, the Secretary shall— (I) streamline the amendment process relating to time-sensitive national priorities, including the Chesapeake Bay total maximum daily load; and (II) give priority to simple amendments to update existing agreements in accordance with subparagraph (C). (ii) Simple amendments A simple amendment of an agreement under this subsection shall not constitute a renegotiation of the agreement. . (3) Payments Section 1234 of the Food Security Act of 1985 ( 16 U.S.C. 3834 ) is amended— (A) in subsection (b)(4)— (i) by striking In addition and inserting the following: (A) In general In addition