under any circumstances, to comply with this title. (2) Cooperative agreements A private landowner may enter into a cooperative agreement with the Federal Government on a willing participant or willing seller basis to include the land of the private landowner in a biological connecting corridor designated by this title. 205. Cooperative agreements and land trades and acquisitions (a) Cooperative agreements The Secretary of the Interior and the Secretary of Agriculture shall seek to enter into cooperative agreements with private, State, and corporate landowners and sovereign Indian tribes the land of which is adjacent to one or more biological connecting corridors designated under this title, if those agreements would benefit the ecological integrity and function of the designated corridors. (b) Land trades and acquisitions The Secretary of Agriculture and the Secretary of the Interior may undertake land trades or acquisitions to carry out the purposes of this title if the Secretary concerned considers the action to be appropriate. (c) Report As part of the report required by section 501, the Secretary of Agriculture and the Secretary of the Interior shall describe the progress of cooperative agreements, acquisitions, and proposed land exchanges sought pursuant to this section. 206. Exemption of certain roads and highways (a) Exemption (1) In general The roads and highways described in subsection (b) are expressly exempted from this title. (2) Additional roads If the Secretary determines that any Federal, State, county, or private road has been mistakenly omitted from the list in subsection (b), the Secretary may exempt the road from this title, if the Secretary determines that the exemption is necessary to carry out the purposes of this title. (b) Description The roads and highways referred to in subsection (a) are the following: (1) United States Highways 2, 10, 12, 20, 89, 91, 93, 95, and 287. (2) Interstate Highways 15 and 90. (3) Idaho State Highways 3, 28, 29, and 87. (4) Montana State Highways 2, 37, 38,