The proposed bill introduces a new chapter, Chapter 90, to Title 18 of the Idaho Code, titled the "Immigration Cooperation and Enforcement Act." This chapter establishes various definitions related to immigration, including terms such as "alien," "illegal alien," and "dangerous crime." It outlines offenses related to illegal entry and reentry into the state, specifying that such violations can be classified as misdemeanors or felonies depending on the circumstances. The bill also details the responsibilities of law enforcement officials in relation to immigration detainers and their authority to cooperate with federal immigration authorities.

Additionally, the bill mandates that custodial authorities determine the immigration status of individuals upon arrest and prohibits the release of illegal aliens from confinement until their sentences are completed, unless specific conditions are met. It provides for immunity for law enforcement officials acting in good faith under this chapter and prohibits courts from abating prosecutions based on pending federal immigration status determinations. The bill emphasizes that its provisions should align with federal immigration laws and declares an emergency for its immediate enactment.