 They included a grant "in perpetuity of the use, occupation, and control" of a sixteen-kilometer-wide strip of territory and extensions of three nautical miles into the sea from each terminal "for the construction, maintenance, operation, sanitation, and protection" of an isthmian canal.Furthermore, the United States was entitled to acquire additional areas of land or water necessary for canal operations and held the option of exercising eminent domain in Panama City.Within this territory Washington gained "all the rights, power, and authority .