The proposed bill establishes a new chapter in Title 43 RCW focused on federal immigration enforcement, aiming to protect immigrant communities while facilitating cooperation with federal immigration authorities. It includes definitions for key terms such as "federal immigration agency," "immigration detainer," and "sanctuary policy." The bill explicitly prohibits state entities and local governmental entities from adopting sanctuary policies that impede law enforcement agencies from complying with federal immigration laws. It mandates that law enforcement agencies use their best efforts to support federal immigration enforcement and outlines specific duties related to immigration detainers, including notifying judges and recording detainer information in case files.

Additionally, the bill repeals several existing laws related to immigration enforcement, which are deemed inconsistent with the new provisions. It establishes penalties for state and local officials who fail to comply with the new requirements, allowing the attorney general to take legal action against violators. The bill also includes provisions to protect the privacy of victims and witnesses of crimes, ensuring that their immigration status is not disclosed if they cooperate with law enforcement. Overall, the legislation seeks to create a framework for enhanced collaboration between state and federal authorities in immigration enforcement while addressing the rights and safety of immigrant communities.