WAT §1231: (a) A right of appropriation from a stream that flows across the state boundary that has the point of diversion and the place of use in another state and is recognized by the laws of that state shall

(a) A right of appropriation from a stream that flows across the state boundary that has the point of diversion and the place of use in another state and is recognized by the laws of that state shall have the same force and effect as if the point of diversion and the place of use were in this State if the laws of that state give like force and effect to similar rights acquired in this State. (b) Subdivision (a) does not apply to interstate lakes, or streams flowing in or out of those lakes. Subdivision (a) applies where an appropriation or change in point of diversion, place of use, or purpose of use is proposed or made under either of the following: (1) A right to the use of waters from the Truckee River if the appropriation or change is made pursuant to the operating agreement described in Section 205(a) of Public Law 101-618. (2) A right to the use of waters from the Walker River and its tributaries if the appropriation or change is not inconsistent with the decree entered in United States v. Walker River Irrigation District, et. al. United States District Court for the District of Nevada Equity No. C-125, filed April 15, 1936, including any amendments to that decree entered before or after January 1, 2015.