; or (E) that is within the Arctic National Wildlife Refuge. (d) Limitation No Federal land may be identified for selection or made available for allotment within a unit of the National Wildlife Refuge System unless it has been authorized by an Act of Congress subsequent to the date of enactment of this Act. Further, any proposed conveyance of land within a unit of the National Wildlife Refuge System must have been identified by the Secretary in accordance with subsection (c)(4) in the report to Congress required by subsection (c) and include patent provisions that the land remains subject to the laws and regulations governing the use and development of the Refuge. 1120. Red River gradient boundary survey (a) Definitions In this section: (1) Affected area (A) In general The term affected area means land along the approximately 116-mile stretch of the Red River, from its confluence with the north fork of the Red River on the west to the 98th meridian on the east. (B) Exclusions The term affected area does not include the portion of the Red River within the boundary depicted on the survey prepared by the Bureau of Land Management entitled Township 5 South, Range 14 West, of the Indian Meridian, Oklahoma, Dependent Resurvey and Survey and dated February 28, 2006. (2) Gradient boundary survey method The term gradient boundary survey method means the measurement technique used to locate the South Bank boundary line in accordance with the methodology established in Oklahoma v. Texas, 261 U.S. 340 (1923) (recognizing that the boundary line along the Red River is subject to change due to erosion and accretion). (3) Landowner The term landowner means any individual, group, association, corporation, federally recognized Indian tribe or member of such an Indian tribe, or other private or governmental legal entity that owns an interest in land in the affected area. (4) Secretary The term Secretary means the Secretary, acting through the Director of the Bureau of Land Management. (5) South bank The term South Bank means the