Nev. Rev. Stat. § 391.161
Each year when determining the salary of a teacher who holds certification issued by the National Board for Professional Teaching Standards, a school district shall add 5 percent to the salary that the teacher would otherwise receive in 1 year for the teacher's classification on the schedule of salaries for the school district if:
No increase in salary may be given pursuant to this section during a particular school year to a teacher who submits evidence of certification after January 31 of that school year. For the first school year that a teacher submits evidence of his or her current certification, the board of trustees of the school district to whom the evidence was submitted shall pay the increase in salary required by this section retroactively to the beginning of that school year. Once a teacher has submitted evidence of such certification to the school district, the school district shall retain the evidence in its records, as applicable, for future school years. An increase in salary given in accordance with this section is in addition to any other increase to which the teacher may otherwise be entitled.
NRS 391.161