Idaho Constitution Art. I, § 4. Guaranty of religious liberty

The exercise and enjoyment of religious faith and worship shall forever be guaranteed; and no person shall be denied any civil or political right, privilege, or capacity on account of his religious opinions; but the liberty of conscience hereby secured shall not be construed to dispense with oaths or affirmations, or excuse acts of licentiousness or justify polygamous or other pernicious practices, inconsistent with morality or the peace or safety of the state; nor to permit any person, organization, or association to directly or indirectly aid or abet, counsel or advise any person to commit the crime of bigamy or polygamy, or any other crime. No person shall be required to attend or support any ministry or place of worship, religious sect or denomination, or pay tithes against his consent; nor shall any preference be given by law to any religious denomination or mode of worship. Bigamy and polygamy are forever prohibited in the state, and the legislature shall provide by law for the punishment of such crimes.