(1) Unless otherwise submitted earlier, the secretary of state shall cause the question of holding an unlimited constitutional convention to be submitted to the people at the general election in 1990. The same question must be submitted at the general election in each 20th year following its last submission, unless otherwise submitted earlier.
(2) The ballot submitting the question to the people must contain the following:
"Article XIV, sections 3 and 4, of the Montana constitution require the question of holding an unlimited constitutional convention to be submitted to the people at the general election in each 20th year following its last submission. If a majority of those voting on the question answer in the affirmative, the legislature shall provide for the calling of a constitutional convention at its next session.