NRS 386.120
County school district: Number of trustees.
1.
The board of trustees of a county school district consists of five or seven members as follows:(a)
If 1,000 or more pupils were enrolled during the school year next preceding any general election, the board of trustees consists of seven members. Except in school districts in which more than 25,000 pupils are enrolled, the members of the board must be elected at large until such time as an alternate manner of election is adopted pursuant to NRS 386.200 or NRS 386.205, 386.215 and 386.225.(b)
If fewer than 1,000 pupils were enrolled during the school year next preceding any general election, the board of trustees consists of five members. The members of the board must be elected as provided in NRS 386.160 until such time as an alternate manner of election is adopted pursuant to NRS 386.200 or NRS 386.205, 386.215 and 386.225.(c)
If 1,000 or more, but fewer than 1,500 pupils were enrolled during the school year next preceding any general election, the board of trustees consists of seven members unless the board, on or before December 1 in any year before a general election will be held, adopts a resolution specifying that the board will consist of five members. If the board consists of seven members, the election of members is governed by paragraph (a). If the board consists of five members, the election of members is governed by paragraph (b).2.
Before the adoption of a resolution pursuant to paragraph (c) of subsection 1, the board of trustees shall post conspicuously, in three different places in the school district, a notice containing in full the text of the resolution with the date upon which the board of trustees of the school district is to meet to act upon the resolution. Posting of the notice must be made not less than 10 days before the date fixed in the resolution for action thereon.3.
If a board of trustees adopts a resolution pursuant to paragraph (c) of subsection 1, it must transmit a copy of the resolution to the Superintendent of Public Instruction on or before December 15 of the year before the general election will be held.
Source:
Section 386.120 — County school district: Number of trustees., https://www.leg.state.nv.us/NRS/NRS-386.html#NRS386Sec120.