Idaho voters will decide on November whether to amend the state constitution to centralize drug legalization authority exclusively with the legislature. House Joint Resolution 4, appearing on the ballot, seeks to prevent local governments and citizen initiatives from legalizing marijuana, narcotics, or other psychoactive substances.
Constitutional Change Proposed
The proposed amendment targets Article III, Section 26 of the Idaho Constitution. That section currently grants the legislature full regulatory power over intoxicating liquor. The original language governing alcohol regulation took effect on December 31, 1934, one year after national prohibition ended.
HJR 4 would expand this specific legislative authority to cover a broader range of substances. The text of the resolution states that “only the legislature of the state of Idaho shall have power and authority to legalize the growing, producing, manufacturing, transporting, selling, delivering, dispensing, administering, prescribing, distributing, possessing, or using of marijuana, narcotics, or other psychoactive substances.”
If adopted, the measure would prohibit local governments from legalizing these drugs. It also precludes the use of the initiative process for legalization, ensuring that such decisions remain within the statehouse in Boise rather than being decided by county commissions or direct voter ballots at the local level.
Precedent and Recent Legislation
The Idaho legislature has a history of preempting local government authority on various policy issues. Lawmakers have previously blocked local regulations regarding firearms, minimum wage standards, and plastic bag bans. HJR 4 follows this pattern by removing the ability of municipalities to set their own drug policies.
Legislative interest in cannabis reform has emerged recently but stalled. During the 2025 session, lawmakers held a hearing on House Bill 401, titled the “Sergeant Kitzhaber Medical Cannabis Act.” The 43-page bill failed to gain traction and did not pass into law.
National Context
Proponents of centralized authority often point to experiences in other states where local or initiative-driven drug policies faced challenges. Oregon provides a notable example. Voters there passed Measure 110, a citizens initiative that decriminalized various formerly illegal drugs. However, the state legislature subsequently passed House Bill 4002, which effectively repealed the decriminalization measures.
The outcome of HJR 4 will determine whether Idaho maintains its current framework or formally codifies legislative exclusivity over drug legalization for decades to come. The measure requires voter approval to amend the constitution.