South Dakota Constitution
Article 6 - Bill of Rights.
§ 3 Freedom of religion--Support of religion prohibited.

§ 3. Freedom of religion--Support of religion prohibited. The right to worship God according to the dictates of conscience shall never be infringed. No person shall be denied any civil or political right, privilege or position on account of his religious opinions; but the liberty of conscience hereby secured shall not be so construed as to excuse licentiousness, the invasion of the rights of others, or justify practices inconsistent with the peace or safety of the state.

No person shall be compelled to attend or support any ministry or place of worship against his consent nor shall any preference be given by law to any religious establishment or mode of worship. No money or property of the state shall be given or appropriated for the benefit of any sectarian or religious society or institution.