Concerning wholesale power purchases by electric utilities under the Washington clean energy transformation act.

SB 5401 amends Washington state law to clarify definitions related to wholesale power purchases by electric utilities under the Clean Energy Transformation Act. It defines key terms like "coal-fired resource" (excluding short-term purchases for reliability or Bonneville power) and "biomass energy" (specifying acceptable sources and exclusions). The bill directly affects investor-owned and consumer-owned utilities purchasing wholesale electricity, ensuring consistent application of clean energy rules. By standardizing terminology, it provides clarity for utilities, regulators, and the Washington Utilities and Transportation Commission when implementing the Act’s requirements. This is a definitional update, not a new policy change.