The bill adds a new enforceable prohibition to chapter 43.376 RCW that bars a state agency from imposing an "undue burden" or otherwise interfering with an Indian tribe's exercise of traditional cultural practices at a tribal traditional cultural place unless the action furthers a compelling governmental interest and is the least restrictive means to do so. It creates a new cause of action allowing a federally recognized tribe to bring a claim in superior court under chapter 4.92 RCW, requires such actions to be commenced within three years of the agency action, and amends RCW 43.376.060 to carve out this right of action from a prior statement that the chapter creates no private right of action. The bill changes legal procedure and burdens of proof: the tribe alleging a violation must first prove that an agency action poses or will pose an undue burden; if the tribe meets that showing, the state agency must then prove the action serves a compelling governmental interest and that the agency chose the least intrusive means. It creates a special evidentiary rule where a tribe certifies that disclosure of information about the tribal traditional cultural place or practices is prohibited by tribal tenets; in that case the agency bears an enhanced burden to prove (a) a compelling governmental interest in pursuing the original proposal, (b) that it is essential the interest be furthered as originally proposed, and (c) that no less intrusive alternatives adequately advance the interest. If the agency fails to meet its burden, it may not proceed with the proposed action. The bill defines key terms for the statute, including "agency action" (projects proposed in state-funded construction or acquisition projects covered by executive order 21-02), "Indian tribe" (federally recognized tribes with traditional lands and territories in Washington), "state agency," "traditional," "tribal traditional cultural place," and "undue burden." Affected parties identified include state agencies, federally recognized tribes, and superior courts. The extracted text does not include the full language of executive order 21-02 so the precise scope of "agency action" is unclear, the procedure or form for a tribe to make the referenced certification is not described, and there is an unexplained numbering inconsistency in the definitions.

If enacted, state agencies that plan or fund construction or acquisition projects covered by executive order 21-02 will face a real legal limit on actions that materially harm tribal cultural places or practices: tribes can bring superior court claims within three years, and if a tribe shows its practices or places are being unduly burdened the agency must prove a compelling need and that it picked the least intrusive option. Practically, projects may be redesigned, delayed, or halted, agencies will face higher litigation and compliance costs, and decisions about whether to pursue or fund certain projects may change to avoid defeats in court. Federally recognized Washington tribes gain stronger, enforceable leverage to protect traditional cultural places and practices and can keep some sensitive information confidential under a special evidentiary rule that shifts the burden onto the agency. The bill increases legal risk for agencies and will put more such disputes into superior court, but key details about which projects are covered (the scope of executive order 21-02) and how tribes formally certify prohibited disclosures are not included here, so the precise reach and procedures remain unclear.