; (7) the city of Imperial Beach; (8) the city of San Diego; (9) the county of San Diego; (10) the San Diego Regional Water Quality Control Board; (11) the Tijuana River National Estuarine Research Reserve; (12) Mexican governments; and (13) other public agencies and organizations with authority for the planning and implementation of conservation strategies relating to the Tijuana River Valley in both the United States and Mexico. (d) Non-Federal share The non-Federal share of the cost of any project carried out with grant assistance made available under the program shall be 50 percent. (e) Definitions In this section, the following definitions apply: (1) Mexican governments The term Mexican governments means the Federal, State, and local governments of the United Mexican States. (2) Restoration and protection The term restoration and protection means the conservation, stewardship, and enhancement of the physical infrastructure in both the United States and Mexico to prevent flooding and wastewater, sewage, trash, and sediment spills in the Tijuana River Valley. (3) Secretary The term Secretary means the Secretary of the Army, acting through the Chief of Engineers. (4) Tijuana River Valley The term Tijuana River Valley means the planning area in San Diego County bounded by the city of Imperial Beach and the Otay Mesa-Nestor community to the north, the San Ysidro community to the east, Mexico to the south, and Border Field State Park and Imperial Beach to the west. (f) Authorization of appropriations There is authorized to be appropriated to carry out this section $50,000,000 for each of fiscal years 2018 through 2022.