Nevada constitution
Article 19: initiative and referendum
Section 4

The initiative and referendum powers provided for in this article are further reserved to the registered voters of each county and each municipality as to all local, special and municipal legislation of every kind in or for such county or municipality. In counties and municipalities initiative petitions may be instituted by a number of registered voters equal to 15 percent or more of the voters who voted at the last preceding general county or municipal election. Referendum petitions may be instituted by 10 percent or more of such voters.