Nevada Constitution Article 14 § 1
The boundary of the State of Nevada is as follows:
Commencing at a point formed by the intersection of the forty-third degree of longitude West from Washington with the forty-second degree of North latitude; thence due East along the forty-second degree of North latitude to its intersection with the thirty-seventh degree of longitude West from Washington; thence South on the thirty-seventh degree of longitude West from Washington to its intersection with the middle line of the Colorado River of the West; thence down the middle line of the Colorado River of the West to its intersection with the Eastern boundary of the State of California; thence in a North Westerly direction along the Eastern boundary line of the State of California to the forty-third degree of Longitude West from Washington; Thence North along the forty-third degree of West Longitude, and the Eastern boundary line of the State of California to the place of beginning. All territory lying West of and adjoining the boundary line herein prescribed, which the State of California may relinquish to the Territory or State of Nevada, shall thereupon be embraced within and constitute a part of this State.