(1) Public utility districts may request voluntary donations from their customers for the purposes of urban forestry. The request may be in the form of a check-off on the billing statement or other form of a request for a voluntary donation.
(2) Voluntary donations collected by public utility districts under this section may be used by the public utility district to:
(a) Support the development and implementation of urban forestry ordinances, as that term is defined in RCW 76.15.010, for cities, towns, or counties within their service areas;
(b) Complete projects consistent with the urban forestry management plans and ordinances developed under RCW 76.15.090; or
(c) Fund a tree planting program for energy conservation that accomplishes the goals established under RCW 54.16.281.
(3) Donations received under this section do not contribute to the gross income of a light and power business or gas distribution business under chapter 82.16 RCW.