; (ii) utilizes techniques that incorporate ecological and coastal engineering principles in shoreline stabilization; and (iii) to the extent possible, maintains or restores existing natural slopes and connections between uplands and adjacent wetlands or surface waters; and (B) may include the use of— (i) natural elements, such as sand, wetland plants, logs, oysters or other shellfish, submerged aquatic vegetation, native grasses, shrubs, trees, or coir fiber logs; (ii) project elements that provide benefits to coastal ecosystems in addition to shoreline protection; and (iii) structural materials, such as stone, concrete, wood, vinyl, oyster domes, or other approved engineered structures. (4) State The term State means each of the several States, the District of Columbia, the Commonwealth of Puerto Rico, the United States Virgin Islands, Guam, American Samoa, the Commonwealth of the Northern Mariana Islands, and each federally recognized Indian Tribe.