For purposes of calculating annual consumptive quantity as defined under RCW 90.03.380
(1), if, within the most recent five-year period, the water right has been in the trust water rights program under chapter 90.38
RCW, or the nonuse of the water right has been excused from relinquishment under RCW 90.14.140
, the department shall look to the most recent five-year period of continuous beneficial use preceding the date where the excuse for nonuse under RCW 90.14.140
was established and remained in effect.