This bill (Substitute Senate Bill 5601, 69th Legislature, 2025) amends existing statutes and adds new sections to advance production and use of alternative jet fuels and related clean fuels. It amends RCW 43.330.570 to require the referenced state office to coordinate with tribes, local governments, state and federal agencies, higher education, labor groups and private parties, to review existing initiatives and incentives, to seek funding, and to develop a competitive grant program (subject to appropriation) for alternative jet fuel infrastructure. The bill also amends RCW 43.21C.535 to direct the Department of Ecology to prepare nonproject environmental impact statements for certain clean energy types (including green electrolytic or renewable hydrogen, large solar and onshore wind, and, subject to appropriation, alternative jet fuel production pathways) with defined scope and mitigation requirements, and sets deadlines for reports related to grant selections and feedstock availability. The bill creates several tax and financial incentives by amending and adding sections to multiple chapters. It expands definitions and eligible projects in RCW 82.89.010 to include alternative jet fuels and related manufacturing and fueling infrastructure for potential tax deferrals (with eligible investment projects defined as at least $2,000,000). It adds a state property tax exemption (chapter 84.36 RCW) beginning July 1, 2029, for buildings, machinery, equipment and associated land used primarily for manufacturing or blending alternative jet fuel that achieves at least a 50% reduction in carbon dioxide equivalent emissions compared to conventional jet fuel; claimants may need a Department of Ecology carbon intensity score, exemptions last 10 assessment years and no claims may be filed after December 31, 2034, and the exemption section expires December 31, 2047. It also creates a parallel state leasehold excise tax exemption for such facilities with similar prorating, filing, verification, duration and expiration rules. A tax preference performance statement and a JLARC review (including a racial equity analysis for communities near a major international airport) are required, with a preliminary JLARC report due by December 1, 2032. The bill also prohibits a department from adopting rules that restrict pipeline flow direction or geographic origin of biomethane claimed as feedstock for alternative jet fuel and requires any rules limiting avoided methane crediting periods to be consistent with California Air Resources Board rules. Important elements are unclear from the provided text: the specific identity of "the office" cited in RCW 43.330.570 and the specific identity of "the department" that will administer the grant, exemption forms, and claim verification are not specified in the extracted facts, several sections are truncated in the provided extracts, and other header-listed amendments and additions referenced in the bill are not included here.

If enacted, the bill would push Washington to expand production and use of low‑carbon alternative jet fuels and green electrolytic hydrogen by funding planning, grants (when appropriated), coordinated research and public‑private partnerships, and by directing the Department of Ecology to do environmental reviews for production pathways that cut lifecycle carbon by at least half. Producers and infrastructure developers would gain new tax incentives: eligibility for investment tax deferrals, a state property tax exemption for new or expanded manufacturing or blending facilities (starting July 1, 2029) and a state leasehold tax exemption, each limited to facilities whose fuel meets the 50% carbon reduction threshold, with claims allowed only through December 31, 2034 and exemptions lasting 10 assessment years (exemptions expire in 2047). The Department of Ecology must also report on feedstock availability (including biomethane) by June 1, 2026, and Ecology is barred from adopting rules that restrict biomethane by pipeline flow or geographic origin, which could broaden eligible biomethane sources for producers. The likely impacts are reduced upfront costs and tax liabilities for companies that build qualifying facilities, greater state and local coordination on siting and environmental mitigation, and new reporting and permitting work for state agencies; counties and local taxing districts face potential lost tax revenue unless they opt in, and the state budget must cover grant and program costs if appropriated. The bill also triggers reviews (including a JLARC racial equity analysis tied to airport pollution) before any tax preference extensions. Important details are missing or unclear in the extracts provided: the specific state “office” and several “department” references are not named, some sections are incomplete, and other header amendments noted in the bill are not shown, so exact administrative roles, rulemaking authority, and the full fiscal impact are uncertain.