Nev. Rev. Stat. § 50.069

1. Except as otherwise provided in NRS 233.190 , a provision of a contract or settlement agreement is void and unenforceable if: (a) The provision prohibits or otherwise restricts a party to the contract or settlement agreement from testifying at a judicial or administrative proceeding when the party has been required or requested to testify at the proceeding pursuant to: (1) A court order; (2) A lawful subpoena; or (3) A written request by an administrative agency; and (b) The judicial or administrative proceeding described in paragraph (a) concerns another party to the contract or settlement agreement and his or her commission of: (1) A criminal offense; (2) An act of sexual harassment, including, without limitation, repeated, unsolicited verbal or physical contact of a sexual nature that is threatening in character; (3) An act of discrimination on the basis of race, religion, color, national origin, disability, sexual orientation, gender identity or expression, ancestry, familial status, age or sex by an employer or a landlord; or (4) An act of retaliation by an employer or a landlord against another person for the reporting of discrimination on the basis of race, religion, color, national origin, disability, sexual orientation, gender identity or expression, ancestry, familial status, age or sex.

2. As used in this section: (a) “ Employer ” has the meaning ascribed to it in NRS 33.220 . (b) “ Landlord ” means an owner of real property, or the owner's representative, who provides a dwelling unit on the real property for occupancy by another for valuable consideration.