Nev. Const. art. 19, § 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.
[Added in 1962. Proposed and passed by the 1960 legislature; agreed to and passed by the 1961 legislature; and approved and ratified by the people at the 1962 general election. See: Statutes of Nevada 1960, p. 512; Statutes of Nevada 1961, p. 813.]