A driver who is under the age of 18 must hold an instruction permit for at least _______ before he or she may apply for a driver's license.

A driver who is under the age of 18 must hold an instruction permit for at least six months before he or she may apply for a driver's license. A driver who is at least 18 years of age must also obtain an instruction permit before applying for a driver's license, but he or she is not required to hold the permit for any minimum length of time. [Instruction Permits, Chapter 1: Getting Your Nevada Driver's License, Nevada Driver's Handbook]