Mont. Code Ann. § 19-1-811

19-1-811 . Referendum by school district. On approval by the board of trustees, a school district of the state may conduct and supervise a referendum or may request that the department conduct and supervise a referendum. The referendum must be conducted pursuant to section 218 of the federal Social Security Act, 42 U.S.C. 418, among the members of the staff and teachers of the school or schools under the jurisdiction of the board of trustees. If the majority of votes cast in the referendum indicate that the staff and teachers approve social security coverage, then the board of trustees shall certify to the department that the conditions for social security coverage, required by section 218 of the Social Security Act, have been complied with.