Any law which the Legislature may have enacted, except one that may be necessary for the immediate preservation of the public peace, health, or safety, or support of the state government and its existing public institutions, shall, upon the filing of a petition as provided in this chapter, be submitted to a vote of the electors of the state at the next general election. The petition shall be signed by not less than five percent of the qualified electors of the state. The form of the petition, including petition size and petition font size, shall be prescribed by the State Board of Elections.
SDCL 2-1-3