To protect States and individuals in States that have laws which permit the use of cannabis, and for other purposes.

Restraining Excessive Federal Enforcement & Regulations of Cannabis Act of 2018 or the REFER Act of 2018 This bill prohibits the use of funds made available by Congress to a federal department or agency: to restrict a state or local law that authorizes the use, distribution, possession, or cultivation of cannabis; to detain, prosecute, sentence, or initiate civil proceedings against an individual, business, or property involved in cannabis-related activities in accordance with state or local law; or to penalize a financial institution for providing financial services to a business engaged in cannabis-related activities in compliance with state or local law.