; 22 U.S.C. 277d–10 ), is amended by striking the period at the end and inserting : Provided further , That the equitable portion of the Nogales sanitation project for the city of Nogales, Arizona, shall be limited to the costs directly associated with the treatment and conveyance of the wastewater of the city and, to the extent practicable, shall not include any costs directly associated with the quality or quantity of wastewater originating in Mexico. . (b) Nogales sanitation project (1) Definitions In this subsection: (A) City The term City means the City of Nogales, Arizona. (B) Commission The term Commission means the United States Section of the International Boundary and Water Commission. (C) International Outfall Interceptor The term International Outfall Interceptor means the pipeline that conveys wastewater from the United States-Mexico border to the Nogales International Wastewater Treatment Plant. (D) Nogales International Wastewater Treatment Plant The term Nogales International Wastewater Treatment Plant means the wastewater treatment plant that— (i) is operated by the Commission; (ii) is located in Rio Rico, Santa Cruz County, Arizona, after manhole 99; and (iii) treats sewage and wastewater originating from— (I) Nogales, Sonora, Mexico; and (II) Nogales, Arizona. (2) Ownership and control (A) In general Subject to subparagraph (B) and in accordance with authority under the Act of July 27, 1953 (67 Stat. 195, chapter 242