; and (bb) at least 1 city, county, township, town, borough, parish, village, or other general purpose political subdivision of a State or Indian tribe (as defined in section 4 of the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 5304 )); and (II) may include any other entity (such as a nonprofit organization or institution of higher education), as determined by the Secretary. (ii) Invasive plant species The term invasive plant species means a plant that is nonnative to the ecosystem under consideration, the introduction of which causes or is likely to cause economic harm or harm to human health. (iii) Secretary The term Secretary means the Secretary of the Interior, acting through the Director of the United States Fish and Wildlife Service. (B) Pilot program The Secretary shall establish a pilot program under which the Secretary shall work with eligible entities to carry out activities— (i) to remove invasive plant species in riparian areas that contribute to drought conditions in— (I) the Lower Colorado River Basin; (II) the Rio Grande River Basin; (III) the Texas Gulf Coast Basin; and (IV) the Arkansas-White-Red Basin; (ii) where appropriate, to replace the invasive plant species described in clause (i) with ecologically suitable native species