1. Short title; table of contents (a) Short title This Act may be cited as the Western Water Security Act of 2019 . (b) Table of contents The table of contents of this Act is as follows: Sec. 1. Short title; table of contents. Sec. 2. Definitions. TITLE I—Infrastructure and water management improvement Sec. 101. Watersmart extension and expansion. Sec. 102. Rural desalination. Sec. 103. Emergency drought funding. Sec. 104. Rio Grande Pueblo irrigation infrastructure reauthorization. TITLE II—Groundwater management Sec. 201. Reauthorization and expansion of the Transboundary Aquifer Assessment Program. Sec. 202. Groundwater management assessment and improvement. Sec. 203. Surface and groundwater water availability and the energy nexus. TITLE III—Water Conservation and Environmental Restoration Sec. 301. Definitions. Sec. 302. Water acquisition program. Sec. 303. Middle Rio Grande water conservation. Sec. 304. Sustaining biodiversity during droughts. Sec. 305. Reauthorization of cooperative watershed management program. TITLE IV—Effect on existing law Sec. 401. Effect on existing law. 2. Definitions In this Act: (1) Rio grande compact The term Rio Grande Compact means the compact approved by Congress under the Act of May 31, 1939 (53 Stat. 785, chapter 155). (2) Secretary The term Secretary means the Secretary of the Interior. (3) State The term State means the State of New Mexico. I Infrastructure and water management improvement 101. Watersmart extension and expansion (a) Definition of eligible applicant Section 9502 of the Omnibus Public Land Management Act of 2009 ( 42 U.S.C. 10362 ) is amended— (1) in the matter preceding paragraph (1), by striking section and inserting subtitle ; (2) by striking paragraph (7) and inserting the following: (7) Eligible applicant The term eligible applicant means— (A) any State, Indian tribe, irrigation district, or water district; (B) any State, regional, or local authority, the members of which include one or more organizations with water or power delivery authority